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Hunting
Long Range Hunting & Shooting
Weatherby Back Country 6.5 RPM Primer cratering
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<blockquote data-quote="OldElkHunter1961" data-source="post: 2414180" data-attributes="member: 121205"><p>My first loads working up for the Weatherby 6.5 RPM used GM215M primers igniting RL 25. I had deep strikes and "flow" or pond rings on all primers and one punctured. Initially I disassembled the bolt measure firing pin depth. None of the work-up loads was at maximum charge weight. I switched to GM210M's and viola, no more pond rings in the primers. No other signs of excess pressure ever manifested. Settled at 66 gr RL 25 with the Sierra 140 GK for 3035 SD 14.8 and 65.6 gr RL 25 with the 143 gr ELD-X for 3045 SD 17.</p></blockquote><p></p>
[QUOTE="OldElkHunter1961, post: 2414180, member: 121205"] My first loads working up for the Weatherby 6.5 RPM used GM215M primers igniting RL 25. I had deep strikes and "flow" or pond rings on all primers and one punctured. Initially I disassembled the bolt measure firing pin depth. None of the work-up loads was at maximum charge weight. I switched to GM210M's and viola, no more pond rings in the primers. No other signs of excess pressure ever manifested. Settled at 66 gr RL 25 with the Sierra 140 GK for 3035 SD 14.8 and 65.6 gr RL 25 with the 143 gr ELD-X for 3045 SD 17. [/QUOTE]
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Weatherby Back Country 6.5 RPM Primer cratering
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