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Discussion Starter · #1 · (Edited)
I will list rifle specs first....

16" BCM upper with V7 barrel ,quote.."Manufacture from Rockwell C 30-32 Hardened 416R Stainless Steel. These barrels feature 1:7 improved Polygonal Rifling, V7 Match Chamber, while being V7 Ultra-Match Lapped." ( cut n' paste... easier then me explaining ) Free Floated, BCM Gunfighter MOD 0 Comp, H2 Buffer , FA BCG.

20" PSA 5.56 NATO chamber, 410 SS, CHF, USGI A2 Free floated, FA BCG


2ea 10 shot groups... for a total of 20 rds. per rifle.... Chronograph...Competition Electronics ProChrono Digital Chronograph .... Velocities measured 15 ft from muzzle...Temp. 82 degrees... approx. 232 ft above sea level.



I removed the previous data listed in this post because I ended up reconsolidating the info into 4 separate lists... 54gr and below, 55gr-61gr, 62gr-74gr, and 75gr and above.

Your MMV... all of this info is being posted because ... frankly, I couldn't seem to find some of this info on the internet.

Factory quoted fps figures are so all over the place... that I wanted some common AR barrel length figures.
 

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It's great you put the time and effort into this, but everyone is going to get different results with their own rifles. For example, my 16" Bushmaster loves PMC Xtac 62gr AP. It shoots it more accurately than any 55gr ammo I've run in it, including Hornady ballistic tips. Results may vary is a good disclaimer whenever you are doing these sort of comparisons.
 

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Very interesting. I would have expected a more significant velocity difference than what you experienced. It would be interesting to see a similar test conducted with a 14.5" barrel added to the mix.
 

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Discussion Starter · #5 ·
It's great you put the time and effort into this, but everyone is going to get different results with their own rifles. For example, my 16" Bushmaster loves PMC Xtac 62gr AP. It shoots it more accurately than any 55gr ammo I've run in it, including Hornady ballistic tips. Results may vary is a good disclaimer whenever you are doing these sort of comparisons.
I will have to try the X-Tac stuff .... I was so let down by the PMC Bronze... that I didn't even want to spend my money on any of their other stuff quite yet.

Have you noticed much muzzle flash ? I have seen and read that it is pretty flashy.
 

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Discussion Starter · #6 ·
Very interesting. I would have expected a more significant velocity difference than what you experienced. It would be interesting to see a similar test conducted with a 14.5" barrel added to the mix.
I did fire some from a 14.5 ..... but the velocity difference was really small... like around 50-80 fps depending on the load... I have noticed that most .223 / 5.56 seems to be using propellant optimized for shorter barrels... this info kind of shows that trend to me.

So I quit doing 14.5 also. I realized that rather than firing a decent amount of ammo...I could pretty fairly guess the approx. speed.
 

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I will have to try the X-Tac stuff .... I was so let down by the PMC Bronze... that I didn't even want to spend my money on any of their other stuff quite yet.

Have you noticed much muzzle flash ? I have seen and read that it is pretty flashy.
Im very impressed with the Xtac. I agree with your assessment of PMC Bronze, you can tell it's light just by the feel of the rifle when you fire it. The Xtac has some balls.

I didn't notice any excessive muzzle flash, however I have a SEI Good Iron muzzle break(sic?) installed
 

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Thanks for the info
I'm sure you could have got more data if it weren't for that pesky guy with the M14's! GI2

That was a very nice setup you had there. Was that the fluted tapered Key-Mod upper you had? That was really sweet! Both rifles were sweet!

Yes, the Geco ammo surprised me as well as the AE50gr. I'll be keeping an eye out for it.

Tony.
 

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Very nice Testing you did there!
Thanks for your good work.
 
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Those mirror some of my testing in my 16" RRA mid-length upper vs my Colt 20" H-bar. Some loads lose quite a bit, some not so much.

Im very impressed with the Xtac. I agree with your assessment of PMC Bronze, you can tell it's light just by the feel of the rifle when you fire it. The Xtac has some balls.
Bronze is .223, X-Tac is 5.56mm; if you are to believe the hype the 5.56mm is loaded a little hotter. I guess I'm fixing to find out... I just ordered a case of PMC X-Tac M855 from TargetSports last night. ($354 delivered.) GI1
 

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Discussion Starter · #12 ·
Thanks for the info
I'm sure you could have got more data if it weren't for that pesky guy with the M14's! GI2

That was a very nice setup you had there. Was that the fluted tapered Key-Mod upper you had? That was really sweet! Both rifles were sweet!

Yes, the Geco ammo surprised me as well as the AE50gr. I'll be keeping an eye out for it.

Tony.
The very lightweight one is this...http://www.bravocompanyusa.com/BCM-14-5-Mid-Length-ELW-KMR13-p/bcm-urg-mid-14elwf-kmr13.htm

It truly does handle much easier because of the LtWt barrel and KMR FF tube.
 

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Thanks for the informative post. This pretty much finished my interest in an AR. My 18.5 M-14 chucks 100 grs more bullet at about the same MV. 7.62x51 stays #1 for me.
Mr. Grenade was meant to clear houses and I already have an AK 47 and a box or two of ammo around here somewhere ICONWINK
 

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Discussion Starter · #14 ·
Hopefully this weekend I can add much more data.

Thanks for all the Votes of Thanks !
 
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Discussion Starter · #15 ·
Thanks for the informative post. This pretty much finished my interest in an AR. My 18.5 M-14 chucks 100 grs more bullet at about the same MV. 7.62x51 stays #1 for me.
Mr. Grenade was meant to clear houses and I already have an AK 47 and a box or two of ammo around here somewhere ICONWINK
You should try some 123gr Horn. SST out of your AK. ( Average 2290 fps )...accuracy was dramatically better
 

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Discussion Starter · #16 · (Edited)
ADDED COMMENTS Sept 20 2014...... YMMV !!!! These are just observations from shooting so many different ammo types in one day ! So my observations are certainly not etched in stone !

PMC XTAC ( both ) are far more accurate than PMC Bronze.
The fastest 55gr. FMJ's were very inaccurate..... so use that ammo within 100yards if speed is needed.
Most of the older 62gr M855 / SS109 surplus is much more accurate than the current XM855... IMI 62gr M855 was easily the most accurate.
I tried separating IMI Razor by numerically specific Headstamp... No improvement in accuracy.
While accurate enough... Current Fed. "varmint weight" ammo is about 10% slower than advertised.
The infamous thin casehead / soft / loose primer pocket FC ammo was really fast.... up to 3144 in 16" and 3316 in 20".... Both Small Letter and Large Letter... Horrible accuracy.
The Fed. "Real Deal" M193 was reasonably fast and accurate compared to the other Bulk Mil-Spec 55gr 5.56
The Hornady 55gr SP ammo wasn't terribly accurate... others beat it easily... GECO 55gr FMJ groups were 1/2 the size.
The Hornady Superformance 55gr GMX was very fast...3130 IN THE 16"....3210 in the 20"... DO NOT USE IN CARBINE LENGTH GAS SYSTEMS !!!!
In my rifles.... the WOLF was a joke as far as 100yd accuracy was concerned...worst of all the tested ammo.
While the various XM193 ( White Box, Brown Box, Stripper Clipped,, AE 5.56, ) is allegedly the same .... I will note that there were differences in accuracy and velocity. While that could be attributed to the various production lots.... I certainly saw a difference.
The Ultramax 68gr split every neck, except for the one case that lost the whole neck. This is old ammo , but it still happened. ( LC 05 headstamp )
The Fed. 69gr GMM had the same case head markings as the Fed. 50gr JHP.... hmmm, I thought GMM would use the BEST brass available...
My 75gr handloads were as accurate as 70% of the factory 75gr -77gr ammo... And frankly I didn't put much effort into it. If you handload you can probably easily match 70% of the factory ammo out there.... with better than OEM velocities.
My rifles ( Or me ?! ) shoot the Factory 75gr Horn. better than the Factory 77gr Sierra and Nosler..... while that doesn't make sense... it was easily noticed.
Don't let the low velocities of the SSA / Nosler 64gr BSB's scare you away... that bullet works very well and the accuracy more that made up for it... the SSA was MOA... Nosler 1 1/4 MOA

Next time I will NOT take so many different items ( Lol )... 40 additional types, times 2 rifles, times every 20 minutes the range stops shooting for 5-10 minutes, times writing data, times sorting ammo, times resorting spent brass for visual inspection...etc... = 9 hours at the bench today.... THANK GOD I like shooting !!
 

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Discussion Starter · #17 ·
60-74gr Factory Velocities.


Brand and headstamp on brass..............................16 " Velocities ( FPS )........20" Velocities ( FPS ).........Comments......,,,,,,,,,,,,,,, NC means NATO CROSS

AMA, 62gr M855...............NATO AMA 12..........................Av. 2889 , ES 31.........................Av. 3005 , ES 42............ Good accuracy for M855

Carl Gustav..62gr .............NATO 12-CG-10.......................Av. 2944 , ES 30..........................Av. 3044 , ES 56.......... Still not sure what to think of this ammo.
This is the Swed. "Green Bullet" Very long for its weight.

Fed. 62gr XM855............ NATO LC 13...........................Av. 2967 , ES 73.........................Av. 3040 , ES 82........... Typical Milspec 2-3 MOA

FNM 62gr SS109..............FNM 91-1 NC..........................Av. 3009, ES 34..........................Av. 3118, ES 44.............Gawd, I miss cheap surplus

GGG 62gr M855...............NATO, 5.56 13 GGG...............Av. 2930 , ES 62.........................Av. 3028 , ES 66.......... Ok, I expected better accuracy.

Hansen / PPU 62gr ..........IK .223R..................................Av. 3004, ES 67..........................Av. 3153, ES 68............

Hirtenberg 62gr SS109....HP .223 5.56............................Av. 2965, ES 71.......................... Av. 3000, ES 68 ...........

IMI 62gr M855.................TZZ 89......................................Av. 3008, ES 44 ..........................Av. 3192, ES 23.............Very accurate for M855.

PMC XTAC 62gr...............PSD 14...................................Av. 2885, ES 38...........................Av. 3051, ES 48...............Both XTAC rounds have changed my opinion of PMC... ( Bronze line still sucks. ) "A" accuracy

Winc. 62gr M855 ............WCC 88....................................Av. 2944, ES 76..........................Av. 3058, ES 56.............

Nosler 64gr BSB .223 .....NOSLER 223 REM..................Av. 2511, ES 58...........................Av. 2560, ES 44.............Not super fast, "A" grade for accuracy.

SSA 64gr BSB 5.56........SSA 5.56...................................Av.2572, ES 109..........................Av. 2570, ES 68............. Had to drop the hammer twice on one round in the 20"..... "A+" accuracy.

Ultramax 68gr..................SPLIT NECKS ON ALL except for the ONE FULL NECK SEPARATION.............................Granted this is 15 years old ammo and maybe they are better now ?!

Fed. 69gr GMM................FC 13 223 REM.......................Av. 2585, ES 30............................Av. 2780, ES 32............. Outstanding Accuracy.. "A+"

PPU 69gr 223...................PPU 223 REM.........................Av. 2564, ES 34................................................Av. 2685, ES 80.............."B+" Accuracy
 

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Discussion Starter · #18 ·
Annnnnd .... the 70gr and above portion....


Brand and headstamp on brass................................................16 " Velocities ( FPS )........20" Velocities ( FPS ).........Comments......,,,,,,,,,,,,,,, NC means NATO CROSS

ASYM 75gr .223...........................LC 14 NC..............................Av. 2605, ES 52.................Av. 2752, ES 40............"A+" Accuracy

Hornady. 75gr Match....................HORNADY 223 REM...........Av. 2510 , ES 50................Av. 2640 , ES 60...........Interesting that this is faster both Nosler and Norma as well as more accurate

Hornady Super. 223 Match 75....HORNADY 223 REM............Av. 2701 , ES 41................Av. 2790 , ES 54.......... Exact same headstamp as the standard 75gr match good accuracy

Hornady Super. 5.56 75... ...........Hornady 5.56 NATO.............Av. 2785 , ES 31...............Av. 2840 , ES 42............Best accuracy in both rifles....

HPR .223 75gr.............................LC 13 NC..............................Av. 2414, ES 87.................Av. 2528, ES 112...........Slow but great accuracy

HSM 75gr 5.56 ... .......................HSM 06 NATO 5.56..............Av. 2648 , ES 31.................Av. 2801 , ES 24.......... Excellent accuracy... out to 300 yards.( As far as got )

IMI 77gr OTM.............................IMI 13 variety of 2 digits.........Av. 2726 , ES 39..................Av. 2810 , ES 41........... Not the most accurate, but certainly a good value.

Norma TAC 77gr........................norma 223 REM....................Av. 2430 , ES 75...................Av. 2550 , ES 68...........Average 77gr accuracy

Nosler CC 77gr...........................NOSLER 223 REM................Av. 2440 , ES 28...................Av. 2569 , ES 36.......... I need more trigger time with this ammo

PPU 75gr .223.............................PPU 223 REM......................Av. 2461, ES 69...................Av. 2590, ES 109............Dismal accuracy... as a matter of fact 4MOA at 100yds.

SSA 5.56 77gr.............................5.56 SSA..............................Av. 2442, ES 25....................Av. 2567, ES 60............."B+" accuracy
 

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Discussion Starter · #19 ·
........ 54gr and below....

Brand and headstamp on brass..............................16 " Velocities ( FPS )........20" Velocities ( FPS ).........Comments......,,,,,,,,,,,,,,, NC means NATO CROSS

Fiocchi 223 40gr V-Max............GFL 223 REM..........Av. 3254, ES 81................Av. 3370, ES 61...............Decent accuracy 1.75 MOA...Fed Tipped Varmint much better

Fed. Red Box 40gr JHP.............FED 223 REM........Av. 3350, ES 30.................Av. 3382, ES 38...............Ok accuracy... some of the first ammo I bought... 30+ years ago

Fed. AE 50gr JHP.....................FC 14 223 REM.......Av. 2959, ES 69.................Av. 3134, ES 109.............. Same type crimp, sealant & Headstamp as the GMM,... Same Brass?

Fed., AE 50gr Tipped Varmint...FC 223 REM............Av. 2943 , ES 48...............Av. 2982 , ES 34................Great accuracy in all my AR's
 

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Discussion Starter · #20 · (Edited)
55-61gr data...

Brand and headstamp on brass..............................16 " Velocities ( FPS )........20" Velocities ( FPS ).........Comments......,,,,,,,,,,,,,,, NC means NATO CROSS

Ratty, Nasty 55gr 1983 Guat... IMG 5.56 83............Av. 3013 , ES 75...............Av. 3182, ES 54.......................... "Don't judge a Ammo Case by its looks"...GTG Lol

Fed. AE 223 55gr .....................FC 06......................Av. 2845, ES 25...............Av. 3068, ES 14............................Prefect example of Low ES / SD doesn't mean accurate.................................................
Fed. AE 55gr ( Small Letter )....FC 223 REM...........Av. 3115, ES 58...............Av. 3299, ES 64............................The original Infamous crappy Fed. Brass
Fed. AE 55gr ( Large Letter )....FC 223 REM...........Av. 3051, ES 54...............Av. 3278, ES 114...........................This is from the same boxes as above
BTW... loaded in H22 Thermold that has been unloaded once and then reloaded for over 20 + years ( minus the loaded, unloaded, reload moment ... Lol )
Fed. AE 223J.............................FC 223 REM..........Av. 2889, ES 68................Av. 2982, ES 94..............................Current production
Fed. 55gr XM193.......................LC 09 NC................Av. 3115, ES 80...............Av. 3168 , ES 32............................Typical Milspec 2-3 MOA
Fed. 55gr M193.........................LC 14 NC................Av. 3088, ES 38................Av. 3220, ES 74............................Supposedly the real thing,not XM, much better than XM accuracy
Fed. 55gr XM193F.....................LC 08......................Av. 3071, ES 42................Av. 3214, ES 59...........................White box.... crimped
Fed. 55gr XM193AF..................LC 14 NC................Av. 3072, ES 49................Av. 3236, ES 54............................Factory stripper clipped
Fed. 55gr XM193.......................LC 08 NC................Av. 3106, ES 27................Av.3232, ES 40.............................'08 Brown Box
Fed. 55gr XM193.......................LC 14 NC................Av. ..........................................................................................'14 Current Brown Box
Fed. AE 55gr XM193C................LC 08 NC................Av.3092, ES 47.................Av. 3206, ES 64............................Black Box

GECO 55gr FMJ...................GECO 223 REM..........Av. 2967 , ES 45...............Av. 3128 , ES 22..........................Quite accurate, and still the "cheap" accuracy king.

Horn. Sup. 5.56 55gr GMX..HORNADY 5.56 NATO...Av. 3130, ES 44...............Av. 3201, ES 55..........................EXTREMELY FAST for a solid copper bullet
Horn. 55gr 223 SP...............HORNADY 223 REM......Av. 2930, ES 41...............Av. 3115, ES 49..........................."B" accuracy

IMI M193..................................TZZ 89........................Av. 2997, ES 74................Av. 3194, ES 24

Independence 55gr (XM193I).. FC 2,1, 13.................Av. 3195, ES 50.................Av. 3343, ES 94..........................Same type of headstamp as IMI 77gr , 4 MOA

PMC 55gr Bronze....................PMC 223 REM............Av. 2626 , ES 82...............Av. 2754 , ES 97........................ Just awful accuracy

PMC XTAC 55gr......................PSD 14........................Av. 2994, ES 33................Av. 3180, ES 72..........................Clearly crimped and sealed. Outstanding accuracy

PPU 55gr.................................PPU 14 5.56X45..........Av. 3061, ES 37................Av. 3240, ES 28...........................Crimped , sealed, PPU Is a excellent value.

Rem. 55gr MC..........................R P 223 REM..............Av. 2910, ES 100..............Av. 3059, ES 77.......................... Reasonable value / accuracy for .223

Winc. 55gr Q3131A.................W.C.C 03 .....................Av. 3105, ES 30................Av. 3234, ES 100........................Winchester IMI.. even says "Made In Israel"
Winc. 55gr Q3131...................WCC 04 NC..................Av. 3162, ES 98.................Av. 3282, ES 101........................Winc. from '04
Winc. 55gr Q3131...................WCC 12 NC...................Av. 3095, ES 59................Av. 3296, ES 40..........................Current
Winc. 55gr Q3131...................WCC 94.........................Av. 3268, ES 80................Av. 3333, ES 50..........................dismal 100yd accuracy... 4-5 MOA

Wolf 55gr .223..........................Wolf 223.......................Av. 2830, ES 40................Av. 2954,ES 109..........................Worst accuracy of ALL... truly laughable.
 
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