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The Range
Ammo & Reloading
messin' with the Mosin
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<blockquote data-quote="Dumpstick" data-source="post: 3102152" data-attributes="member: 41653"><p>Some thoughts on the factory powder -</p><p></p><p> I mentioned that this powder looks remarkably similar to IMR4895.</p><p></p><p> Looking in the Lyman #48, it shows a 7.62x54R load for a 150gr jacketed soft point - start at 42.5gr @2438 fps.</p><p> At 42gr of factory powder, I was getting 2345 fps.</p><p></p><p></p><p> Many recommend using .308 "start" data if none is available for the 54R with whatever powder one may have. The case sizes are similar, .308 to 54R, with the 54R being slightly larger. The slightly larger case of the 54R will result in somewhat lower pressure, so one doesn't get into trouble.</p><p></p><p> Lyman #48 also shows a load for .308 starting with 40.0gr @2403 fps.</p><p> At 40gr factory, I was getting roughly 2275, averaging the 2 strings. Keep in mind , I'm using steel jacket ammo, not copper.</p><p></p><p> These data are very similar to what I got from the 54R. I think the factory powder is very close in burn rate to IMR4895, and I will use the leftover powder in a manner similar to IMR4895, without getting to max loads.</p></blockquote><p></p>
[QUOTE="Dumpstick, post: 3102152, member: 41653"] Some thoughts on the factory powder - I mentioned that this powder looks remarkably similar to IMR4895. Looking in the Lyman #48, it shows a 7.62x54R load for a 150gr jacketed soft point - start at 42.5gr @2438 fps. At 42gr of factory powder, I was getting 2345 fps. Many recommend using .308 "start" data if none is available for the 54R with whatever powder one may have. The case sizes are similar, .308 to 54R, with the 54R being slightly larger. The slightly larger case of the 54R will result in somewhat lower pressure, so one doesn't get into trouble. Lyman #48 also shows a load for .308 starting with 40.0gr @2403 fps. At 40gr factory, I was getting roughly 2275, averaging the 2 strings. Keep in mind , I'm using steel jacket ammo, not copper. These data are very similar to what I got from the 54R. I think the factory powder is very close in burn rate to IMR4895, and I will use the leftover powder in a manner similar to IMR4895, without getting to max loads. [/QUOTE]
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