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We are starting load development, 7MMx57 AI. |
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d4570 
.416 Rigby 
Joined: 27 January 2004 Location: United States Status: Offline Points: 9343 |
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 Topic: We are starting load development, 7MMx57 AI.Posted: 23 August 2023 at 11:45 |
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I'm still fire-forming the AI part, but we have enough brass to start loads.
I want to keep them around 2700, or 2800 fps Similar to the factory 7x57 in a 140-ish bullet. It's for a small framed 14-year-old girl. She has been shooting for 8 years and is very good. But does not enjoy heavy recoil, is not afraid of it but does not like it. She is shooting a Ruger American re-barreled with a Shaw barrel 1x7 twist, 22". This is the first try. She is shooting off a bench with sandbags at 100 yards.  LRX 145 gr best of 3 loads. The recoil with Big Game Powder has noticeably more recoil.  ttsx 140 gr best of 3 loads. Check out the fire-forming target 20 shots in an inch and a half. 
Edited by d4570 - 23 August 2023 at 11:46 |
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