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My AR shoots Hornady 123 SST ammo @ 3/4 MOA. I've tried RL 15, AR Comp, AA2250 , IMR 8208 , H 4895, Win 748, CFE 223, Benchmark. I can get descent groups at 100 yds. but nothing less than 1 1/2 to 2 1/2 at 200. I'm using Horn. brass CCI # 41's. I'm using Redding type S bushing die with .283 bushing the .284 doesn't give enough neck tension to prevent forward bullet movement. I don't have the expander ball in the bushing die. I'm baffled. I've never run into this in all the tears i,ve been reloading.
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The SST's loaded at 2.270 are . 95 thousands off the lands.Originally posted by glk45 View Post -
I think that depends on the way the chamber is reamed. My Faxon 16-inch has more freebore than the other two barrels I've fiddled with.Comment
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I guess im missing the question.Comment
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What are you baffled about? 3/4 minute is just fine. Doesn't appear that anything is wrong.Originally posted by glk45 View Post
If you think the performance is bad, you should consider trying a different bullet.
LR55Comment
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From the way I am understanding it,he is having trouble duplicating the accuracy of the factory loads.Originally posted by LR1955 View Post
Although, 1.5 inch at 200 is .75 moa......Comment
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I meant 1 1/2- 2 1/2 MOA @ 200. Tried the 123 ELD's today with same results. I've also tried 100 & 120 NBT'sLast edited by glk45; 09-16-2018, 09:15 PM.Comment
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So, what kind of dispersion are you getting at 200? Vertical, horizontal, random??
Myself, I've had to work hard at shooting an AR even at 100. I've shot conventional bolt-action sporters for many years but when I started working for accuracy in the AR15 platform, I had to adapt. A bipod helped a lot. Even still, shooting good groups at 200 is much more difficult even with a very accurate bolt gun. I haven't read all your posts so maybe you haven't described your experience. I make my own targets using PowerPoint and print them as needed and have found that a target that works well at 200 has to be well thought out.
Even if you're having no technique issues, a load that shoots well at 100 is not guaranteed to shoot well at 200. Maybe you should pursue your load development at 200 exclusively. I think that's what I'd try.Comment
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I will be that guy.......
It is not always the rifle or the bullet; might wanna look at the shooter.
Just saying.....
We are quick to blame to something else even though we are Navy SEAL, Sniper, Ranger, SF, God of War, and Call of Duty qualified.― George OrwellComment
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glk45,
Unconvinced there is an issue here other than wind. If you can shoot well at 100 it may be explained by environmental interference. By that I mean double the wind. Which is why most shooting for groups occurs at 100. If you think the bullet is starting to yaw or go unstable it won't suddenly do that after 100, it will have been doing that from the muzzle. You will see it in the shape of the holes and in an exponential widening of groups beyond 200. Have you shot 300 or 400 with these rounds?Comment
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I havn't shot in the wind. I try not to when working up loads. I can't shoot 300, 400 & 500 until the corn is harvested. If i have a 1 MOA group @ 100 it's 1 1/2 MOA or larger at 200 not vert. or horiz. stringing. I'm shooting of a solid rest with rear bag.Comment
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Something is not right here. The only time I have seen groups blow out like the mouth of a trumpet is when they approach subsonic down range. That won't happen between 100 and 200. One other thought comes to mind is the bullet is spinning too fast and over-stabilised. It resists pointing down after apogee. If you are shooting normal bullets with normal twist rates for 6.5 that won't happen either.Originally posted by glk45 View Post
If it is groups shot at 100 and 200 on the same day with the same ammunition it has to be wind. It doesn't have to be blowing a gale for this to happen. Air is always moving and the bullet moves with it.Comment
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It could be the shooter. It could be the technique, the cheek weld... It could be the trigger. It could be the ammo (higher SD values than you think, so MV's actually varying more widely than thought). It could be the optics. It could be your eyes, the brightness/clarity of the 200 yd targets... It could be the wind. There are several places to look.
We really need more info on your build, barrel, scope, mount, etc, trigger, type of rests your using, is it a solid bench, etc etc...
How many rounds downrange... ie, is this build still in a break-in mode...
Lots of things to look into.
Do you have pictures of the build, of the targets, you can post..."Down the floor, out the door, Go Brandon Go!!!!!"Comment
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Ding ding ding we have a winner folks, first person to post the right answer.Originally posted by grayfox View Post
We need more info on your setup sir.Comment
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After reading all the posts here, especially the OP's. My main take away from it is, he is hunting around an accurate load.
My advice, pick one combo, and practice with it. 1 bullet, 1 powder, 1 primer. I would consider the ELD, easy bullet to shoot accurately.
Start over using just a regular die, you are making it it complicated by using bushing dies and adjusting neck tension etc.
As others have said, shooting an AR accurately and consistently takes time and practice. Keep it simple, work on the fundamentals.
As for the SST, it is not a match bullet, I would accept what it gives and adjust accordingly, but that's me.
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