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camber dimesnsions too minimum

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Unread 03-01-2014, 01:46 PM
Bronze Member
Join Date: Dec 2006
Posts: 47
Re: camber dimesnsions too minimum

It is the belt length on the brass guys.

It is easy to make all the belts the same with a Wilson case trimmer and proper cutter.

Get the Wilson magnum gauge to measure cases.

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Unread 03-01-2014, 05:48 PM
Gold Member
Join Date: Oct 2006
Posts: 543
Re: camber dimesnsions too minimum

SAAMI chambers are .220" to .227" for 300 Win Mag, 7mmRemMag, 338 WinMag, ect.

I have never found any 300WM, 7mmRM, nor 338WM brass longer than .215".

So I chamber my belted magnum rifles for .215".

Most factory rifles are much closer to the SAAMI min of .220" than to the SAAMI max .227".

With the exception of old Glock 22 40 S&W chambers, most ammo and factory chambers are at the small end of the wide and sloppy SAAMI tolerances.

303 Brit is the sloppiest [headspace for rim + rim thickness].
260 Rem is the tightest [neck diameter of chamber].
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