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McMillanTAC338

Lapuatom

I recently bought a McMillan tac338 rifle. I want to develope load data for Sierra 250g &300g mk bullets.Will be using lapua brass. Any help/comments on this firearm and or load data are welcome
 
I had good luck with 89 grains of Reloader 25 with the 300 SMK in my 338 Lapua. Might work up to it and watch for pressure signs. Good luck.
 
On what length bbl did you do your testing? Any chrono numbers? How well did it shoot? What make rifle are you using? Sorry for all the questions.Thank you for the help.
 
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