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I present to you the .........
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Old 01-22-2009, 12:38 AM
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gitano gitano is offline
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Default I present to you the .........

Well... we haven't named it yet, but here it is "in the flesh".

I got the .357 Max brass today and wasted no time making up a dummy. It happens to fit the chamber of the VZ-24 barrel I chambered for it, like a glove. At 0.375" the neck turns out to be a bit longer than I wanted (0.257"), but I'll live with this for the moment. If I order a reamer, I'll shorten the neck.

Anyway, having the actual case in hand, I get the following numbers from QuickLoad:

Rim thickness: 0.060"
Body length: 1.181"
Shoulder length: 0.048"
Neck length: 0.375"
Case length: 1.604"
Rim diameter: 0.431"
Head diameter: 0.376"
Shoulder diameter: 0.373"
Neck diameter: 0.341"
Neck wall thickness: 0.009"

Case capacity in grams of water: 1.986 g (or CCs)
Cae capacity in grains: 31.78 (Even more than the 30.0 grains previously calculated even with the short neck.)

At a max chamber pressure of 20,000 PSI behind a 125-grain Hornady out of a 24" bbl, I get 1948 f/s MV and ME of 1052 ft-lbs. Sighted in for a max of 2" above the line of sight, it's dead on at 126 yds, 2" low at 150, and 6" low at 200. Energy at 100 is 767 ft-lbs, at 150 it's 652 ft-lbs, and at 200 it's 600 ft-lbs. Impact velocity at 200 is 1471.

To be honest, I think this cartridge is "a bit much" for the Steven Favorite even at the modest 20,000 PSI chamber pressure. HOWEVER, I'm beginning to 'like' it for a Martini Cadet (which I understand is actually a .323 caliber), or similar single shot rifle. Or even the Encore. In fact, in the Encore, with the pressure run right up to 40,000 PSI, it might prove to be down right spiffy.

At 40k PSI, and a 24" barrel, (not Encore length, but SS rifle length), MV is a spritely 2350 f/s, and it carries 1000 ft-lbs out to 150 yds with an impact velocity of 1800 f/s. What's not to like?

Anyway, I think this is going to be "OK".

Paul

- Forgot the picture
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File Type: jpg .32 Real from actual .357 Max case.JPG (16.3 KB, 167 views)
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Last edited by gitano; 01-22-2009 at 12:53 AM..
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8mm, 8mm max, 8x.357 max, wildcat


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