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Neither of those powders are really suited for that caliber with those bullet weights. ------------------ | |||
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<Mike Dettorre> |
Ricciardelli, You got a reason. I am not a ballistician, physics or powder expert but powders usually work in ranges. I find similiar case capacities and styles and similiar weight to caliber bullet loadings that surround the scenario I have described. ------------------ The sole purpose of a rifle is to please its owner | ||
<Don G> |
I assumed you were using 3.31 inch COl (M98 magazine length), a 24 inch barrel and an 8x57 Mauser case blown to .358 (65 gr estimated water capacity) with a 225 gr Nosler Partition. Quickload says that a compressed load of 62 grains of H414 is your best choice as far as velocity goes with 2605 fps at 50,000 PSI. (That's max recommended load pressure for the European CIP standard for this case. 56,600 absolute max pressure.) RL-15 came in second in velocity at 50,000 psi - 2589 fps. H4350 is 'way down the list. Give me actual barrel length, case capacity in grains of water at overflow, bullet length and weight and cartridge overall length and I will make another run. I think the H414 is a good choice, though. I'm surprised the RL-15 didn't work out. 53.7 grains == 2589 fps and a full (but not compressed) case. Starting loads would be a 5% reduction from these numbers if I was doing it - but I may be placing too much faith in QL. Ten percent reduction is the standard starting point. Don [This message has been edited by Don G (edited 03-11-2002).] | ||
<eldeguello> |
Powders in the IMR 4350 quickness range may be a trifle slow for that case. I would try ones like IMR 4064, WW 748, IMR 4320, 4895, etc. Of these, my first test would be with 748, because you can get more of it into a case than you can with a stick powder. I got my best velocities from the regular .358 Win. with WW748. | ||
<Mike Dettorre> |
First of all a big thanks to Don. Here are some more specs Using a Nos 225 P Case Capacity = 67 grains of water COL 3.07 Cases actually have to be formed from 06 brass now...a long story to bottom of sholder 1.87"approx If anybody is looking for Whelen performance in a "shorter" masuer length action and does want to mess with a mag box...this cartridge would do it. 23" bbl in a Encore and yes the rifle is light and kicks very hard.
The sole purpose of a rifle is to please its owner [This message has been edited by Mike Dettorre (edited 03-11-2002).] | ||
<Don G> |
Using the modified data I get that RL-15 is the best powder for velocity. (All loads at 50,000 PSI) 51.4 grains, 2540fps. IMR3031 is the next best powder commonly available in the USA. 48.4 gr, 2540 fps. IMR4895 50 gr. 2510 fps Hodgdon BL-C2 52.1 gr, 2504 fps AA2520 51.6 gr, 2501 fps H335 50.1 gr. 2498fps H414 57.1 gr, 2475 fps (5% compressed) HTH, Don | ||
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Don, where do you get this software program? | |||
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