Jud,
I have an original Mod 1, w/repo 26 inch barrel (the original barrel is kept in a safe place).
It shoots a 360 grain bullet, cast from a 3 cavity mold made & sold by Mike Oziak. I prefer this sized round as it does very well at both 50 & 100, and given it's size/weight it isn't affected as much due to cross winds as compared to smaller, lighter projectile variants (it's also very effective when impacting on breakable targets).
Rounds are sized via Lubrisizer to .518 Cal
Reduced capacity brass, holding a 23gr 3F Goex charge.
She performs VERY well, thanks in part to the large sight radius that the M-1 offers via it's tang sight.
If/when you get your hands on one, you won't regret it - esp. after you get it all worked up/fine-tuned!!
Hope this info is of some use! Unfortunately I can't help on the diamater of the rear tang's peep (I've never bothered to measure it).
Semper Fi,
Rob Freeman
Col, USMC (Ret.)
1987-2019
The quality of a person's life is in direct proportion to their commitment to excellence, regardless of their chosen field of endeavor. - Vince Lombardi
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