300 win mag 5r groups

  1. C

    Advanced Marksmanship Remington 300 win mag 5r 100m grouping help

    Hi, I've been shooting this 5r for about 6 months. I've been working up custom loads, setting various off the lands OALs Mostly SMK 190 and 200, berger 190 VLD rl 22 / 25, H1000, H4350 I'm pretty meticulus with the prep, but I haven't been cleaning the primer pockets. (just got an stm...
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