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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 ruger necked down to 358
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<blockquote data-quote="LeddSlinger" data-source="post: 1756327" data-attributes="member: 65338"><p>My chamber is just a straight 375 Ruger necked down to 338. No other modifications.</p><p></p><p>Not sure how or IF it outperforms the RUM. I've never owned a 338 RUM.</p><p></p><p>My barrel is a Brux, 1 in 10" twist with Sendero contour finished at 26". I have pushed the 250gr up over 3000 fps, but Hornady brass primer pockets will not hold up. They seem to do fine just below 3000.</p><p></p><p>I was using 76.5 gr of H4350 for my original load and was getting 2930 fps. Changed to RL16 when it hit the market for better case fill. Accuracy was still good with RL16 while using the same exact charge weight of 76.5gr, but speed jumped to 2980 fps average. No pressure signs and primer pockets staying strong.</p><p></p><p>Here's a short 4 round ladder test I did at 100 yards checking POI shift with RL16 using weights of 76.3gr to 76.9gr. Good temp stable powder and not much POI shift. Speeds have been verified on 3 different chronographs over the years.</p><p></p><p>[ATTACH=full]158298[/ATTACH]</p></blockquote><p></p>
[QUOTE="LeddSlinger, post: 1756327, member: 65338"] My chamber is just a straight 375 Ruger necked down to 338. No other modifications. Not sure how or IF it outperforms the RUM. I've never owned a 338 RUM. My barrel is a Brux, 1 in 10" twist with Sendero contour finished at 26". I have pushed the 250gr up over 3000 fps, but Hornady brass primer pockets will not hold up. They seem to do fine just below 3000. I was using 76.5 gr of H4350 for my original load and was getting 2930 fps. Changed to RL16 when it hit the market for better case fill. Accuracy was still good with RL16 while using the same exact charge weight of 76.5gr, but speed jumped to 2980 fps average. No pressure signs and primer pockets staying strong. Here's a short 4 round ladder test I did at 100 yards checking POI shift with RL16 using weights of 76.3gr to 76.9gr. Good temp stable powder and not much POI shift. Speeds have been verified on 3 different chronographs over the years. [ATTACH=full]158298[/ATTACH] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
375 ruger necked down to 358
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