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My mag measures 2.83 (71.8) on the nose almost

His restriction is mag length

SAUM brass is about same length as 243 - back to same issue

LOL
If you shortned up a 243 AI it would work.. then you have a Creedmore?

I know what would be perfect... 243 WSSM

The Grendal, Creedmore etc will feed fine out of AISC mags

243AI in AISC mag = short OAL - not ideal combo in my mind.
My 308s just fit let alone a long pointy 105 VLD

Run 6.5 Grendal through sizing die, load and when it comes out its AI for next time - same with 243 AI

Alot less powder burnt, for not far off speeds and the ability to seat bullets out where they...

What about 6mm Turbo 40deg? (Basically 6.5 Grendal, necked to 6mm and Improved)
2850 with 105 VLDs and ALOT easier on barrels etc