[Cracker Larry]

I've got a fairly new SOCOM, less than a year old. I had originally installed an Aimpoint PRO on the forward rail mount. It sighted in great and I had it shooting about 1 3/4 " high at 25 yards and about an 1" high at 100. Best as I could tell with my shooting abilities anyway.

I didn't really care for the SAI plastic stock, nor the forward rail scope mount. It was accurate enough for me but I couldn't co-witness the iron sights and it didn't feel to balance well. So I took all that off and put her in a good walnut GI stock and installed a Sadlak mount for the Aimpoint.

When I first tried it at 25 yards, it wouldn't even hit the paper. I had to put up 9 pieces of paper to tell where it was shooting, and it was a couple of feet high. Adjusted the AP down about 36 clicks to get it where I wanted at 25 yards. Moved back to 50 yards and shot a few more groups. They were almost 2' high! Corrected the red dot for 50 yards and tried it at 100. Off the paper again. Re-zeroed the AP for where I wanted it at 100. OK.
Moved back up to 25 yards and I'm shooting in dirt at that range. Windage is perfect but elevation is really out of whack.

My best guess is that the mount is not parallel to the barrel. So how do I make it exactly level and verify it? Sure would appreciate any suggestions.

I also want to say that I really appreciate this forum, the knowledge shared and the character of the members. This is a class act here. RNGR1

 

[MuppetMeat4Me]

My guess is that the mount or the scope is moving. No way 100 and 25 yards should be nearly that different.

One other thing, the scope looks high enough that I would guess a consistent cheek weld is unlikely. If the scope has parallax differences based on eye position, could also be a culprit.

BTW, nice looking rifle!

 

[SA762]

I can't help much but I was thinking about setting up my SOCOM/Aimpoint similar to yours.
Looking at your pictures it appears that the aimpoint sits even higher on the receiver mount than it did on the factory scout mount. What do you think? I agree that having it mounted forward throwers off the balance of the rifle.

 

[gumby]

Ditto on Muppet's suggestion. BTW, you sure have a fine looking assistant there!!ICONLOL

 

[XM25Ren]

That is a very fine looking rifle you have there, I agree you will need a cheek riser.

Ren

 

[Cracker Larry]

Thanks to all. The scope and mount are rock solid and loctited. It's not moving. I has to be out of level with the barrel.

I can't help much but I was thinking about setting up my SOCOM/Aimpoint similar to yours.
Looking at your pictures it appears that the aimpoint sits even higher on the receiver mount than it did on the factory scout mount. What do you think?

Yes, it does sit higher than the forward rail mount did, but the front rail mount wouldn't let me co-witness the iron sights. This rail is just barely high enough to do that. It's a Sadlak standard height. They also have a low mount, but then I'm back to can't see the irons.

I don't know.

 

[wookiee]

I have a Sadlak on my National match. my suggestion would be to take it off, and slowly install it. use blue Loctite on the screw threads. make sure it is lined up perfectly. I made the mistake of installing it quickly the second time I installed my scope mount and I had the same issue. there's a lot of pieces to that mount and if you do your part it will do as advertised. right now I consistently shoot sub moa with my rifle at 100 yds. before I reinstalled it correctly it was patterning like a shotgun.

 

[Cracker Larry]

I feel sure it's not mounted exactly right. It's shooting very tight groups, less than 2" at whatever range I zero it for. But if I zero it at 25, it is 3' high at 100. And if I zero at 100 it's kicking up dirt underneath when at 25.

I'll figure it out.

 

[MuppetMeat4Me]

How far off is 'kicking up dirt' at 25 yards?

If nothing's moving, and the aim doesn't change with head position, and you're not pulling it down during the shot, impact at 25 yards should be lower than at 100, but not more than the vertical difference between the center of the barrel and center of the scope. Eyeballing it in the Internet, I'd just guess that should be about 3 1/2" or so. If you're actually impacting more than 4" or so, something else is going on.

I guess you could just zero at 25 yards, aim 3" high at 100, and probably be pretty close back to zero at 200, assuming you have access to anything that far (which you're allowed to shoot )

 

[Cracker Larry]

I guess you could just zero at 25 yards, aim 3" high at 100,

I'm not talking about 3 inches, I would be very happy with that. I'm saying almost 3 feet difference between 25 and 100. Consistently. Even I can shoot a lot closer than that! The iron sights are about dead on. Maybe I'll just take off the red dot and use the irons instead.