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Rifles, Reloading, Optics, Equipment
Reloading
Norma MRP temp sensitive?
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<blockquote data-quote="cdherman" data-source="post: 2138079" data-attributes="member: 12282"><p>I have what's left of an 8 lb jug of MRP that I bought at some vague point in the last 10 years. I tried it in a number of guns and never was quite happy enough. I never had a complete temp sensitivity disaster, but I don't load hot. But I did not get session to session accuracy retention that I would like.</p><p></p><p>IIRC, I read a LOT about temp sensitivity, as I hunt in Kansas, where it can be zero in deer season, and it might have been 95 when I developed my loads. MRP was reputed to be better than some of the Alliant powders (the old one's like RL-22) in terms of temp sens, but not as stable as the Hogdon temp stable series (H4350, H4831, H1000 etc)</p><p></p><p>There also were rumors that MRP was the SAME as RL-22. This is not likely true, but they are very similar powders in terms of burn rate and density.</p></blockquote><p></p>
[QUOTE="cdherman, post: 2138079, member: 12282"] I have what's left of an 8 lb jug of MRP that I bought at some vague point in the last 10 years. I tried it in a number of guns and never was quite happy enough. I never had a complete temp sensitivity disaster, but I don't load hot. But I did not get session to session accuracy retention that I would like. IIRC, I read a LOT about temp sensitivity, as I hunt in Kansas, where it can be zero in deer season, and it might have been 95 when I developed my loads. MRP was reputed to be better than some of the Alliant powders (the old one's like RL-22) in terms of temp sens, but not as stable as the Hogdon temp stable series (H4350, H4831, H1000 etc) There also were rumors that MRP was the SAME as RL-22. This is not likely true, but they are very similar powders in terms of burn rate and density. [/QUOTE]
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Norma MRP temp sensitive?
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