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virgin brass...? Chad..?
#6135627
01/14/16 06:53 PM
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Joined: Apr 2007
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Kyle Horn
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so i am doing further load development on my Gap-10. it has a very tight match chamber. I know that "fire formed brass" is supposedly more consistent/accurate. however the shoulder is only set back .005 from my chamber. will it really effect my load development if i choose to use the virgin brass? not that it matters but my data is as follows gap-10 20" .308 new win brass 178 amax 42-44 gr of varget CCI LR
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Re: virgin brass...? Chad..?
[Re: Kyle Horn]
#6135647
01/14/16 07:03 PM
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ChadTRG42
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It may change it up some. Just keep the head stamps the same. If you do a partial sizing, make sure they will chamber. I'd recommend a FL sizing for a gas gun.
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Re: virgin brass...? Chad..?
[Re: Kyle Horn]
#6136046
01/14/16 11:19 PM
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Kyle Horn
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it is all Winchester. all FL sized. i guess i suck at asking my question correctly, but what i mean is virgin Winchester brass has shoulders sized.005-.007 deeper than my chamber. when i full length size i usually only bump back about .004" therefor these will have an extra .002-.003 to expand, will that aspect effect load development or accuracy?
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Re: virgin brass...? Chad..?
[Re: Kyle Horn]
#6136069
01/14/16 11:33 PM
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ChadTRG42
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It can. I'll verify my load again from virgin brass to once fired brass. I normally don't see much difference. I did see some differences in my 6.5x47 Lapua from virgin brass to once fired. I sized it with a slight bump of .003", and picked up about 50 fps and had some sticky bolt lift. So, I may need to reduce my load a touch. It also didn't put them in the same hole like they did with the virgin brass.
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Re: virgin brass...? Chad..?
[Re: Kyle Horn]
#6136076
01/14/16 11:35 PM
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Joined: Nov 2011
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DStroud
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So it's Actually NEW brass? If so there may be a slight change in pressure thus velocity once you resize but not enough to fret over and there is nothing you can do but fire and resize to suit yourself.
"Anyone taking up handloading necessarily plays with unknown factors and takes chances. But so does anyone who drives a car,goes to a cocktail party,eats in a restaurant,or gets married."
Jack O'Connor 1963
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Re: virgin brass...? Chad..?
[Re: Kyle Horn]
#6136094
01/14/16 11:45 PM
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Kyle Horn
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so load develope with the virgin, then fine tune with once fired... i guess it sounds like i was being too OCD about the extra .002-.003 of setback
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Re: virgin brass...? Chad..?
[Re: Kyle Horn]
#6136114
01/14/16 11:57 PM
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kmon11
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so load develope with the virgin, then fine tune with once fired... i guess it sounds like i was being too OCD about the extra .002-.003 of setback Exactly what I do. Most of the time your load with new brass will be very close to what you get with fire formed brass. Sometimes exactly works or sometimes a tenth or two more or less gets you there.
lf the saying "Liar, Liar your pants on fire" were true Mainstream news might be fun to watch
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