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Fire forming 30br with 147 bullet, what charge?

I finally got around to trying those those 147s .
They were a breeze. 30g of v133 or RL15 blew the shoulder out were it needed to be. No primer marks

How far did it move from virgin to fireformed?

my experience with my 30br chambers was they realy dont "NEED" to be firformed.
I have shot 22X one time with new virgin brass.
 
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How far did it move from virgin to fireformed?

my experience with my 30br chambers was they realy dont "NEED" to be firformed.
I have shot 22X one time with new virgin brass.
I had only 20cpieces that needed forming. Only the shoulder needed to be blown out 5 thousandths.
Yeah but, Im also culling brass that blew up, just making sure the ones I turned are target worthy. These are my own neck turned brass. I understand what you mean that you could shoot that good with virgin brass. Iv seen some good groups so far. I did notice though that those groups where from brass that were all the same.
 
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