My son has a slow twist 5.56 that shoots 52 grain Sierra MatchKing sub-MOA and simply won’t shoot 55’s. So I load up the 52 SMKs for him. They’re loaded to 1.901” CBTO. I was loading some last night and was shocked when I switched to a new box of the 52s. I’m the ridiculously OCD type and check the measurement after every round I load. Without touching the die, the first round out of the new box of 52s measured ten thou shorter! I wondered Wtheck I did. So I loaded two more…same exact measurement…1.891”. The 52 is a flat base and obviously a short projectile so I was shocked when I saw that much variance. Needless to say I adjusted the die and carried on. I’ve posted before about the variances I’ve seen over the years using Hornady ELD Match also but haven’t noticed it in Sierra because I haven’t used them much. I have never seen this issue using Bergers….period. I guess that’s why Erik Cortina and many others say just buy yellow box projectiles and be done with it. I shoot nearly exclusively Bergers so I haven’t had that particular issue before. Have y’all ever noticed that much variance in SMKs?
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Last edited by PVDT; 03-22-2023, 07:24 AM. -
Same lot number? Ten thou is a lot
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I have tried and shot quite a few different brands, but Berger’s just shoot the best. Now I’m not saying they necessarily kill the best but in every rifle I’ve tried them in I see the best groups compared to hornady, nosler, sierra, etc.Comment
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Not the same lot. I bought them several months apart. Ten thou might as well be 10 feet.Originally posted by Raider4044 View PostComment
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I had the same result with 6mm TMKsComment
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