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Old February 14, 2013, 08:34 PM   #13
Senior Member
Join Date: June 6, 2004
Location: Rocky Mts
Posts: 857
Unfortunately, no, nobody has really standardized the bore and groove dimensions. It seems even with one manufacturer they can vary a fair bit. I've heard of recent Marlins running .378" to .381". The late-ish Winchester 94s over the past 20-some years have run from .375" to .381".

Oddly, even with oversize bores, many guns seem to shoot fairly well, just not all of them. Cast seems to be more of an issue than jacketed in that regard.

I haven't priced factory ammo, I havent shot any in ages, and only then when it was cheaply priced, like surplus or aquired in a trade. Brass and dies, and one is in business.
"Far better it is to dare mighty things, to win glorious triumphs even though checkered by failure, than to rank with those poor spirits who neither enjoy nor suffer much because they live in the gray twilight that knows neither victory nor defeat." -Theodore Roosevelt-
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