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Long Range Hunting & Shooting
300 WM Long Range Load Help
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<blockquote data-quote="donwill" data-source="post: 1503084" data-attributes="member: 89976"><p>Compare your firing pin imprint on the 73.5 primer with that on the 72.5 primer. If there is no difference in size or depth you should be ok. if you see a difference back off the 73.5 with your group a .4 at 100 you may be as good as you get more powder may increase speed but you will need to chronograph for that. and move to 2-300 yards to see if the group remains consistant. You might want to also compare a freshly loaded cartridge to your 73.5 and look for differences and deformities.</p></blockquote><p></p>
[QUOTE="donwill, post: 1503084, member: 89976"] Compare your firing pin imprint on the 73.5 primer with that on the 72.5 primer. If there is no difference in size or depth you should be ok. if you see a difference back off the 73.5 with your group a .4 at 100 you may be as good as you get more powder may increase speed but you will need to chronograph for that. and move to 2-300 yards to see if the group remains consistant. You might want to also compare a freshly loaded cartridge to your 73.5 and look for differences and deformities. [/QUOTE]
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