Waiting for my brass to grow - 300wm

[Muskyjerk]

Measured my chamber last weekend ( never did this before always went by the book numbers) and I have around .020" left before I have to trim on my brass.

questions:

How long will it take brass to grow .020" (firings)

Rifle is a TRG42, I run 208's at 2700fps brass is 1980's win

what's your guess

Thanks

MJ

 

[1slow01z71]

2700 is a pretty light load unless you've got a really short barrel. My 26" does 2900 with 77gr of H1000 which isn't exactly a world on fire hot load either in Winchester brass.