So I measureda factory, unfired, 30.06 Remington case that was loaded and got 2.4760. So, I trimmed my cases to 2.4760. NOW, for S&Gs I decided to look it up online. Well max length is 2.49 and minimum is 2.48. So the internet says. Did I just destroy 20 cases? I know they will stretch after they are fired but.......is a .004 difference too short? Hope I dont annoy anybody with my elementary questions. Thanks.
0.004" won't hurt anything. The most important thing, accuracy wise, is that the brass is trimmed to the same length.
I shoot 7mm Rem Mag brass resized and fireformed into 257 Weatherby Mag with no problems and excellent accuracy. The 7mm Rem Mag brass is 2.500" max length, with the trim-to length 2.490". The 257 Weatherby Mag max case length is 2.549", with the trim-to length 2.539". When the 7mm Rem Mag is necked down in (minimally) fireformed, the cases are roughly 0.04" shorter in the neck than Weatherby cases and specs. If you compare them side-by-side, the reformed 7mm Rem Mag brass are noticeably shorter in the neck (the 257 Wby has a long case neck, however). My rifle shot the resized 7mm Rem Mag brass into consistant 3/4 MOA groups during fireforming. So no, the small difference doesn't really matter, as long as they are not over the max case length spec, and they are trimmed to a uniform length.
That brass is fine. Don't worry about .004". Now you can shoot them a couple times before you need to trim again
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Thanks. I was sweating a bit i must admit. bronko, you the same one from the BP section? This site is great. Honest answeres and great comments. I should have been here years ago.
0.004" won't hurt anything. The most important thing, accuracy wise, is that the brass is trimmed to the same length.
I shoot 7mm Rem Mag brass resized and fireformed into 257 Weatherby Mag with no problems and excellent accuracy. The 7mm Rem Mag brass is 2.500" max length, with the trim-to length 2.490". The 257 Weatherby Mag max case length is 2.549", with the trim-to length 2.539". When the 7mm Rem Mag is necked down in (minimally) fireformed, the cases are roughly 0.04" shorter in the neck than Weatherby cases and specs. If you compare them side-by-side, the reformed 7mm Rem Mag brass are noticeably shorter in the neck (the 257 Wby has a long case neck, however). My rifle shot the resized 7mm Rem Mag brass into consistant 3/4 MOA groups during fireforming. So no, the small difference doesn't really matter, as long as they are not over the max case length spec, and they are trimmed to a uniform length.
Mike
This man is correct-a short neck won't hurt anything. It
s when it gets too long that problems occur.
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Yup, brass is just fine. This is my second lot of reloads and I should have started reloading a long time ago. The Benchmark shoots just fine and its not as dirty as H4895. Zero @ 100yds, tac driver. 200yds, its opens up to about 1 3/4" groups. 300yds, it was kind tough cuz by the time I had worked up to 300yds, the wind came about. Still, 6" low, 6" to the left and still had a 2 1/2" pattern. I never got that out of factory loads. I was thinking about upgrading my Savage 30.06 to a Remington 700 but after this performance, why? Somy Savage isa bit banged up but it still shoots great. Maybe a new stock.
Brass too short.
