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May 3, 2008, 01:59 PM | #1 |
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Some emperical evidence supporting difference in NATO brass vs. "civilian" brass.
I wanted to see how much difference there really was, if any, between NATO (Lake City) brass and "regular" brass (Remington).
So, I loaded up 43 grains of WW 748 in each, under a Nosler 180 solid base bullet and tested them through a Chrony. Rifle is a Weatherby Vanguard .308 Win. The rounds through the Remington brass averaged 2557 fps. SD 19.9 The rounds through the LC brass averaged 2675fps. SD 23.4 That's over 100fps difference, and the only thing different is the brass. I even alternated rounds fired to eliminate any issue of the barrel heating up affecting velocity. Temp was 45 degrees, elevation was 1000 ft. Thought it was an interesting test. Tom |
May 3, 2008, 02:37 PM | #2 | |
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Quote:
If you want a real difference, throw Federal American Eagle into the mix. Oh, and less internal capacity = higher pressure = greater velocity. Regards, Walt
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May 3, 2008, 11:23 PM | #3 | |
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Quote:
http://www.6mmbr.com/308win.html .
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May 4, 2008, 06:24 AM | #4 |
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It was an interesting test, but not quite for the reasons stated.
For me it confirms the 1 gr difference I usually use for powder charges between .308 & 7.62 ammo. 100fps comes out really close to the data I have for different loadings with the 1 Gr allowance. Thanks. |
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