Does this sound right? .300blk

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CANNONMAN

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I plan on making my own .300 and have seen and watch a bit. I think this would make the most sense. Clean .223 brass, Reform to .300, Trim to size. De-burr, Anneal. Load.

I've seen other steps but I don't see cutting the brass and then reforming as different case seem to yield slightly different measurement. And then require an additional trim. I've also been told there is no real reason to anneal .300's? To me anneal with a taper crimp is good for several reasons. Sub-sonic is mostly the goal. I'm one of those who think the .300 in a pistol is a great HD choice. Anyway, how would you suggest otherwise? I mean the steps of course.
 
Your 300 BLK die probably does not have enough room in it to resize a full length 223 Rem case. Hence, you cut off the excess length of the 223 Rem case, size to 300BLK then trim to final size.
 
Trim to Length, then Size to 300BO, Annealing is not necessary do to the lower velocity of the bullet. If you plan to work a large number, I would suggest a trim jig that holds the brass the same to permit accurate trimming.

Good Luck
dg
 
Sort by Headstamp (to avoid turning necks), cut to length, FL resize, then trim. I anneal lots of bottleneck brass, but have never seen a reason to anneal 300BO until you've got a couple firings on it.
 
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