.357 Magnum loads for Python?

[jphendren]

I have a 4" 1967 Colt Python, along with a 6.5" 1937 S&W Registered Magnum, and I would like to put together a .357 Magnum load that would be safe in both. I understand that the Python is a smaller gun, and as such may not be able to tolerate the loads that an N-frame S&W can. I have some 158gr LSWC that are cast out of Linotype (BHN 22), and have gas checks. They are sized .358 which should work well in both revolvers. I would prefer a relatively hot load, I like the water jugs to explode LOL.

I have both 2400, W296, and would like to work with these. I have seen loads of 13-15.3gr of 2400, with a standard small pistol primer. And 15-16.7gr of W296 with small pistol magnum primers.

Anyways, have any of you guys fired LSWC over either of these powders in a Colt Python? What is safe in a Python? A few years back I fired 12gr of 2400, with a WSPM primer under some cheap 158gr lead SWC's, those shot pretty nice, didn't seem to hard on either gun, but leaded like gangbusters!! My guess is that they were not really a .357 Magnum either at only 12gr of 2400.

Jared

[porsche]

I think your gas checks will help eliminate leading as will proper bullet fit and good lube. I find 358 sizing works in most colt 357 caliber revolvers so you should be good there too. Personally I don't like 296 powder and would use 2400. A Python in good condition is strong enough to use factory ammo in 357 or loads that duplicate them. Reloading manuals are full of loads as are the on line powder manufacture sites.

[ColtSnakes]

Not that it helps, but I shoot alot of .357 158 gr LSWC over Unique...Matter of fact, I shot a hundred or so today...I don't get any leading and haven't busted a Python with them, yet.

[porsche]

I agree with coltsnakes about Unique, my favorite powder for all around use.

[rockquarry]

You will likely find #2400 the most suitable powder for fairly heavy to stout loads (that are also accurate) in the .357. While 296 / 110 will also provide both accuracy and velocity, the attendant muzzle flash and blast will be noticeably greater than with #2400, assuming both powders are loaded to the same velocity level. Having never tried Unique in the .357, I can't comment as to its suitability other than the fact that it's a much faster burning powder than the others and would not be the first choice for most experienced handloaders. Nevetheless, should you have some on hand, it deserves a try.

[porsche]

If you are really after screaming fast loads get jacketed bullets and use 296/110. About six grains of Unique will give a nice range load at 1034fps with a 158gr. LSWC with gas check, according to Alliant and my 25 years of reloading.

[ColtSnakes]

I use about 5.6 grains of Unique under a 158 gr non-gas checked bullet. They run about 1010 fps according to my chronograph. These loads do not lead any of my revolvers....They are not the max loads that you can find for this powder for a LSWC, but are stout enough to let you know you aren't shooting .38's, either. If you look thru enough manuals, you can find loads that are a couple of grains higher. I've never tried 'em. I figure leading might start to rear it's head with them....Unique will do a fantastic job in .357 and get it done with half the powder it would take if using 2400 or W296.

As far as jacketed loads goes, I've loaded plenty with Unique with good results. It isn't my first choice. Right now that would be Power Pistol. I have also had good results with Blue Dot over the past couple of decades.

[bmcgilvray]

I have a fine little range load, put up in .357 Magnum cases, that uses the 158 grain plain base SWC and just a little less Unique, 5.0 grains. This load gives 936 fps from a 6-inch barrel. It is great for both .357 Magnum accuracy efforts and for relaxing plinking sessions with quality .357 Magnum revolvers.

[jphendren]

I ended up trying 16gr of W296, with my 158gr RCBS LSWC-GC bullets. That load shoots great!! I tried it in both the S&W RM and the Python, shoots like a laser. We were making hits at 100 yards with them. After firing, just tip the revolver muzzle up, tap the rod, and all the cases just fall into the bucket. RCBS states 16gr as a starting load, and 17gr as max. They seemed about like some factory .357's that my friend was shooting from his stainless Python in the noise and recoil department.

Jared

[Peter M. Eick]

14.5 grns is my standard with 2400 and a 158 lasercast in my Python or my Registered. Both get shot with it and I have had zero problems.

Accurate loads!