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Long Range Hunting & Shooting
7mm PRC
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<blockquote data-quote="ElkValleyHunter" data-source="post: 2753988" data-attributes="member: 126262"><p>I finally was able to buy six boxes of 7mm PRC (Precision Hunter) for my new Christensen Arms Ridgeline. While going through the break-in sequence, I measured an average of 2903 fps (4,500 ft. elevation, 30 F).</p><p></p><p>I noticed the bolt being a bit difficult to lift after a shot but didn't think much of it until after 3 boxes... Every single rounds have over-pressure signs - flatten primer and extractor marks! I was absolutely surprised that factory ammo would be that high on pressure. I've been brushing and cleaning the bore every 3 rounds for the break-in.</p><p></p><p>Is that something anyone else noticed? I was planning to reload with H4831SC at 60 to 62.5 grains, to try to get close to the same velocity, but I'll wait to figure things out.</p></blockquote><p></p>
[QUOTE="ElkValleyHunter, post: 2753988, member: 126262"] I finally was able to buy six boxes of 7mm PRC (Precision Hunter) for my new Christensen Arms Ridgeline. While going through the break-in sequence, I measured an average of 2903 fps (4,500 ft. elevation, 30 F). I noticed the bolt being a bit difficult to lift after a shot but didn't think much of it until after 3 boxes... Every single rounds have over-pressure signs - flatten primer and extractor marks! I was absolutely surprised that factory ammo would be that high on pressure. I've been brushing and cleaning the bore every 3 rounds for the break-in. Is that something anyone else noticed? I was planning to reload with H4831SC at 60 to 62.5 grains, to try to get close to the same velocity, but I'll wait to figure things out. [/QUOTE]
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