New brass challenge. Poll the Audience
I have a slight dilemma. I was given a little over 200 pieces of primed, virgin .300 blk brass. The problem is, the shoulder measures on average .006 longer than my new Starline brass. As I suspected, it’s difficult to chamber and extract so it’s obviously out of spec. I’m absolutely sure it’s virgin brass… clean as a whistle, no sizing die marks and no other scratches or imperfections. It’s just slightly out of spec. Running it through my sizing die puts it back to where it needs to be and all is well.
Here’s the challenge… how would you go about sizing all this brass? The way I see it I’ve got a couple options…
Lube by hand and size one at a time on my turret press.
Place cases upside-down on bench or in loading block to help prevent lube from entering the inside of the case then spray with Dillon lube and size on my progressive.
Then..
Wipe lube off by hand with alcohol and paper towels like I do for small batches. (Would suck, but is probably safest)
Dry tumble in corn cob for about 45 minutes like I do for big batches. (Easiest, but worried about contaminating / f’ing up primers)
Spray lube, size, load and then dry tumble loaded rounds in corn cob. (Worried about powder sticking to lube that will inevitably make it into some of the necks, never tumbled loaded cartridges before.)
If you were in my shoes, what would you do?