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We are starting load development, 7MMx57 AI.

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d4570 View Drop Down
.416 Rigby
.416 Rigby

Joined: 27 January 2004
Location: United States
Status: Offline
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Post Options Post Options   Thanks (0) Thanks(0)   Quote d4570 Quote  Post ReplyReply Direct Link To This Post Topic: We are starting load development, 7MMx57 AI.
    Posted: 23 August 2023 at 11:45
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
Remember: Four boxes keep us free ,the soap box, the ballot box, the jury box, AND the cartridge box
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