M14 Forum banner

1 - 13 of 13 Posts

·
Registered
Joined
·
1,332 Posts
Discussion Starter #1
To those who have tried and/or use them, which seems to shoot better in your M1A's? Sierra 2155's or 2156's.

Suggestions for loads would be appreciated also.
 

·
Registered
Joined
·
40 Posts
I couldn’t get a 2156 to shoot in either of my NM M1’s 3006 or 308. The Nosler 155 shoots great and I’ve been told they are similar to the old 2155.
 

·
Registered
Joined
·
9,256 Posts
I've used around 40 grains of both AR Comp and IMR 3031 in my Loaded model and SOCOM rifles and they work pretty well.
 
  • Like
Reactions: 1100 tac

·
Registered
Joined
·
1,332 Posts
Discussion Starter #4
Thanks for the load info, they don't seem to be very popular bullets. I found a box of each at a yard sale for cheap, couldn't leave them there for $10.00.
 

·
Registered
Joined
·
2,262 Posts
I used Tac & Varget for the 155 MK's & they shot good from my SOCOM & 18.5" Wolfe Barrel . Ran out & now loading 155 Match Monsters , which are supposed to be Noslers . Never used the Palma's .
 

·
Super Moderator
Joined
·
11,028 Posts
I couldn’t get a 2156 to shoot in either of my NM M1’s 3006 or 308. The Nosler 155 shoots great and I’ve been told they are similar to the old 2155.
I couldn't get them too work either, however my 7.62mm M1 Garand sure has developed a taste for Berger's 155 hybrids under 43.5grn of H-4895 in a LC case coal set at 2.82
 

·
Registered
Joined
·
2,284 Posts
I get better accuracy results with the 2155 in the M1A, and have not gotten the 2156 to shoot as well, despite a lot of experimentation with the 'Palma' 2156 a few years ago. The secant ogive/profile of the 2156 is very different from the 2155 - and I think the traditional tangent profile of the 2155 is much more forgiving of bullet jump. In a bolt action I suspect the 2156 loaded long is a good choice for long range, given it's BC is much higher than the 2155 - but the 2156 is a much longer bullet and some downloading of the powder change may be required if loaded at mag length (~2.80 - 2.82") .

Note: The 2156 is designed specifically for Palma competition shooters (ie, they basically use heavy bolt action rifles with long 28"-30" barrels, 1/13 twist, tight chamber, short jump to lands, and loaded warm to get 3,000+ fps at muzzle for 1000 yard competitions). The BC is .504 for the 2156, compared to ~.450 for the 2155, but as I noted, the older 2155 shoots better in every M1 and M1A that I have tested them in...as I think they are much more jump tolerant based on their tangent ogive profile.

434017
 
1 - 13 of 13 Posts
Top