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I read some of the old threads on the 7X57 and noticed that you have had good luck with IMR-3031, which prompted my use of it for one last try with some stubborn 150 grain bullets. I had tried at least 4 different powders, all of them slower burning, with dismal results with this Rem. PSPCL, with the best average of 2.87" for 3 groups. Yesterday, I went up to your reccomended 40 grains of 3031 and shot 3 groups, which averaged 1.34". There was no pressure signs at all and I probably could go higher without problems. I didn't chrono them because, frankly,I had lost confidence in them and wasn't expecting them to do much better than previously. Hey, I know that won't win any benchrest medals but, I'm pleased that I've cut the groups in half. Now I can use up the rest of the 500 with a little more confidence. | ||
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one of us |
Seafire has written that the load books are not balanced, but biased towards slow powders. Once he pointed that out, I can see it is true. So I was not surprised to read of his using 3031 in 7mm Mauser.
He does allot of IMR4198 for 8mm, but with powder charges more like Hodgdon's H4198 loads than IMR's data [12.5 gr extra]. I am doing my small part to spread the word about faster powders. I just loaded some 154 gr HNDY round nose moly 7mm Mauser for my brother with 48.1 gr IMR4350 [it's what he wants] and 43.2 gr IMR4895 [what I am trying to convince him to use] | |||
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I also have a 7X57 in a 95 Chilean. It absolutely loves 150gr Winchester PowerPoints and 36 or so grains of H4895. -Spencer | |||
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