One of my AR's has a 1/8 twist 24" stainless bull barrel. I've been fooling with it for several years but I can't seem to find a load that's accurate. I've tried 55gr, 62gr and 69 gr bullets both Sierra and Nosler. Not that good. Does anybody have a load that might work?
Need a load for 1/8 bull barrel
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You might try 21.5 gr. IMR 4198 with 55 gr. bullet and 21.0 gr. with a 62 gr. bullet. The IMR 4198 has always been an accurate powder with the .223 and 5.56. Just have to find the sweet combo for your rifle. Velocity will not be the highest but it will be accurate. -
Is it a 223 or a 5.56? If it's a 5.56 it probably has a longer throat. You might try seating the bullet farther out.Comment
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What powders have you tried. Varget, RL15, H4895, and TAC are the top rated powders by HP shooters.Comment
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I like 23.5gr of TAC with a Sierra 77gr Matchking. Same with the 80 gr Matchking but those won't fit in your magazines and need to be single loaded. TAC is a spherical powder and meters nice, temperature tolerant and burns pretty clean. A buddy of mine bought a couple 8 lb xxxx of Hornady LeverRevolution powder and swears by it. He found some for $125/xxxx a real good deal. It's a medium burning powder in the Varget/TAC/4895 range. I shoot a Rock River NM with a White Oak Armament 1/8" barrel. You might look for some Nosler 77s, too, I've seen good deals on them.Comment
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When you get more bullets try WW748, I think you will be pleased. I had the same problem trying to find a 100 yard load for my NM AR 1:8 twist years ago. Nothing I tried worked. One of the older shooters told me 52 gr Sierra MK and WW748 and then 69 gr SMK with WW748 for 200/300. Amazing accuracy out of my rifle.Comment
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Well I reduced the powder charge to min and increased it by 1/2 gr up to the max. I used a 69 gr Nosler. Everything was CRAP. I've loaded 10 each 75 gr hp's . If they don't work then > My next time out I'm taking several 30 round mags and I'm going to see just how hot I can get that barrel. My version of heat treating.Last edited by joem; 10-06-2014, 01:15.Comment
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I tried out the 75 grs and that was the worst group I ever shot. Group size was 14 to 16" @ 100 yds. On my other rifles 69 gr for the 1/7 and 62 gr for the 1/9 twists. My thinking is something in between would be 65 gr. As soon as they are back in stock I'll try them. If that doesn't work then the barrel is history.Comment

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