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Rifles, Reloading, Optics, Equipment
Reloading
Virgin brass, or once fired!
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<blockquote data-quote="parshal" data-source="post: 1907394" data-attributes="member: 605"><p>The replies here certainly give a lot to think about and have created a lot of questions for me. I run a mandrel in new brass and start load development immediately. I'll shoot through the whole lot and then tweak the load if needs tweaking. It usually doesn't. But, I do recall having a barrel that shot virgin brass better than subsequent firings. </p><p></p><p>The comments about seating depth changing are interesting. With Wilson seating dies and an arbor press I can see measured differences in CBTO of a couple .001" at times. I just can't wrap my head around the best load having a seating depth tolerance within .005". It so close to the margin of error of our equipment. I'd rather be shooting than fighting thousandths. A .005" seating depth difference shouldn't produce a dramatic difference on the target unless you're a benchrest shooter, IMO. </p><p></p><p>The comments about pressure changing from virgin to fired brass is also interesting. I fireform brass for the 22 Creed from 22-250 brass. That's a pressure change. If a load changes dramatically from factory to fireformed brass due to the pressure difference I'd say that load isn't in the node.</p><p></p><p>I guess we should qualify what we're talking about here, though. Are we talking about virgin brass shooting .2's and fireformed shooting in the .7's? Or, are we talking .010's?</p></blockquote><p></p>
[QUOTE="parshal, post: 1907394, member: 605"] The replies here certainly give a lot to think about and have created a lot of questions for me. I run a mandrel in new brass and start load development immediately. I'll shoot through the whole lot and then tweak the load if needs tweaking. It usually doesn't. But, I do recall having a barrel that shot virgin brass better than subsequent firings. The comments about seating depth changing are interesting. With Wilson seating dies and an arbor press I can see measured differences in CBTO of a couple .001" at times. I just can't wrap my head around the best load having a seating depth tolerance within .005". It so close to the margin of error of our equipment. I'd rather be shooting than fighting thousandths. A .005" seating depth difference shouldn't produce a dramatic difference on the target unless you're a benchrest shooter, IMO. The comments about pressure changing from virgin to fired brass is also interesting. I fireform brass for the 22 Creed from 22-250 brass. That's a pressure change. If a load changes dramatically from factory to fireformed brass due to the pressure difference I'd say that load isn't in the node. I guess we should qualify what we're talking about here, though. Are we talking about virgin brass shooting .2's and fireformed shooting in the .7's? Or, are we talking .010's? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Virgin brass, or once fired!
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