Ok..don't ask y, but I went the wildcat route and I have a 358x57 "improved" meaning it is almost straight walled and a 20 degree shoulder angle.

Having difficulty finding an accurate load. I would like to use H4350 or H414 becuase I use it in a lot of my rifles.

The case hase capacity between a 358 Win and a 35 Whelen but I find no H4350 or H414 loads for those calibers.

But I do find H4350 and H414 loads for the 8x57 and 9.3x62 which the case is also similar to

What do you recommend and already tried RL15 doesn't like it.

Bullet weight will be 220/225...cananybody do some extrapolations and maybe recommed a starting load?

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MED

The sole purpose of a rifle is to please its owner

[This message has been edited by Mike Dettorre (edited 03-10-2002).]

Neither of those powders are really suited for that caliber with those bullet weights.

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http://stevespages.com/page8.htm

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.

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MED

The sole purpose of a rifle is to please its owner

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).]

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.

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
shoulder angle 20"
to top of shoulder 1.935
case trim length 2.255

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.

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MED

The sole purpose of a rifle is to please its owner

[This message has been edited by Mike Dettorre (edited 03-11-2002).]

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

Don, where do you get this software program?