Re: Poll on brass life
How much you do and how much don't work your brass makes a ton of difference. At 8 reloadings (sometimes) I'm retiring (re-purposing?) my brass, and I'm fairly sure it's somewhat premature.
I sorta/semi/full length resize my brass. Confusing, eh?
I back off the F/L die so it doesn't resize down the entire length of the stroke. Instead I set it so 1/3 or less of the neck length gets resized.
This leaves the lower wall expanded, the shoulder untouched, and the actual neck working to the tip of the neck, some of which gets trimmed eventually anyway.
Sure the lower wall gets bigger, but it doesn't get reworked, so IMHO, it matters not so much as long as it chambers, and it does easily, at least in relation to the lower case wall. In fact, I'd be less trusting of the lower wall if it was <span style="font-style: italic">repeatedly</span> expanded <span style="font-style: italic">and</span> resized.
The shoulder behaves exactly the same as if it were being neck-only sized. An occasional readjustment of the die to do a true F/L resize/bump is in order, but that's nothing extraordinary.
The 1/3 or less neck length sizing is still quite adequate to ensure proper bullet retention, and can be adjusted further as a means of managing neck tension, should one be so inclined.
The net effect here is that the critical portions of the brass case get worked less, and brass life should benefit.
At least it's worth a thought or two.
Greg
PS The reason I don't think in terms of sacrifice is because, after a couple of decades, I've concluded that velocity is a false god and far too many worship at his altar. No amount of velocity is going to eliminate drop and drift. You'll always have to cope with it in some form or other, and comparing more to less really isn't the point.
Being able to anticipate and influence it is; in whatever shape, size, or flavor it comes in. Accuracy comes at least once, and sometimes in several nodes. IMHO, far better to choose the one that allows better bore longevity. When I hear of 'rainbow trajectories', I think about the old Buffalo Hunters, and how they'd be laughing at what folks today consider as a 'rainbow trajectory'.
I take it a step further and use a longer barrel so I can maybe get an adequate velocity with even less mayhem being perpetrated in the engine room.