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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
new to me 300 RUM Sendero
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<blockquote data-quote="kweidner" data-source="post: 548052" data-attributes="member: 4964"><p>I had a pile if re22 laying around (12 pounds). Figured I would give it a whirl. Local gunsmith had a box of 150 mrx and 150 interbonds. figured I could try the MRX while I was waiting on the bergers. Prepped the once fired brass. flash hole, pocket uniform, trimmed, and turned necks to 90percent clean. Started at 94 in .5 increments. got to 95 .400 groups and 3590 fps. no pressure signs still .5 under published max and bug hole groups. Still have 41 out of the box of 50. Extreme spread was 4 fps. Really? I have never found a good consistent load that fast except one time with my cooper 6.5 x .284. I expected that one though! But a 4 foot ES 85 fps over published data with a bc of .420 with no pressure signs to boot come on! I can surely stick with these as they are probably good to 600 as I load some heavys for 1000 yds plus. I am currently tumbling brass and am going to shoot a 10 shot group over chrony. Gun now has 38 rounds out of it.</p></blockquote><p></p>
[QUOTE="kweidner, post: 548052, member: 4964"] I had a pile if re22 laying around (12 pounds). Figured I would give it a whirl. Local gunsmith had a box of 150 mrx and 150 interbonds. figured I could try the MRX while I was waiting on the bergers. Prepped the once fired brass. flash hole, pocket uniform, trimmed, and turned necks to 90percent clean. Started at 94 in .5 increments. got to 95 .400 groups and 3590 fps. no pressure signs still .5 under published max and bug hole groups. Still have 41 out of the box of 50. Extreme spread was 4 fps. Really? I have never found a good consistent load that fast except one time with my cooper 6.5 x .284. I expected that one though! But a 4 foot ES 85 fps over published data with a bc of .420 with no pressure signs to boot come on! I can surely stick with these as they are probably good to 600 as I load some heavys for 1000 yds plus. I am currently tumbling brass and am going to shoot a 10 shot group over chrony. Gun now has 38 rounds out of it. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
new to me 300 RUM Sendero
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