best powder for 357 in 158g

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calldog

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I need some help this weekend. I just got a 357mag in a rifle and would like to reload for hunting. What is the bet power and amount to use. I am wanting to use a 158gr jacked soft point. I am looking at bullseye and bluedot. Please help.
 
I like 2400 and load both pistol and rifle loads in .357 mag with it. For safety's sake you should work up your own load for your particular rifle using a good reloading manual instead of using someone else's data. Start with the minimum and work up in small increments until you find the "right" load. That's half the fun of reloading anyway.
 
Check out Alliant's online data for 2400, reduce 10% and work up from there to accuracy. You can do the same thing with Blue Dot, which I do not use but others have had success with.

ALSO: What Anotherguy said. Your rifle is an individual, figure out exactly what it likes.
 
16.6 grains of 296, I use this in my 4" revolver and get 1300 fps, should give 1800 out of a rifle.
 
With your two choices, it'd be blue dot. In my rifle the charge would be stiff as far as the reloading manuals go. But blue dot is a little fast burning for this caliber in a rifle. If you could buy a pound of something else:

Winchester 296, Alliant 2400, Vit N110, or AA#9 should work between well and flat out excellent.
 
If you have any access to 2400, give that a shot. My 158gr 2400 loads for 357Mag are some of the best I have. I have tried plenty of powders for kicks, but nothing touched 2400 for me, especially for accuracy. I shoot out of a Marlin 1894 as well as a Ruger Blackhawk SA.
 
Blue Dot is a good powder for 125gr loads and is pretty good with 158gr too. I personally like 2400 with 158gr and heavier bullets, AA#9 is a close second and W296 or H110 are also good but are not as economical.

Blue Dot can be a bit tempermental and its performance varies if you try use ammo loaded with it in cold weather but if you stick with fall hunting in temperatures over 45 degree F you probably will not notice any issues.
 
I'll ring in with H110, which is extremely similar to W296. I use it in a Puma chambered for .357, but I do use more 125 grain bullets than 158. I would personally avoid using Blue Dot for reasons already stated regarding cold weather reliability. That being said, I do use Blue Dot in .44 Mag reduced loads (15 grains with 180 grain Hornady XTP). One of my co-workers has a small-framed 10 year old with a Marlin 1894, and he can shoot the reduced loads comfortably.
 
I've never experienced any problems shooting blue dot in my .357s in colder temps.? What kind of problems are you having, low pressure? I ask because I have shot with the temps in the teens in hunter silhouette's.

I like blue dot because it burns much cleaner than 2400 or 296 with my load of 11 grains pushing a 158 grain bullet. I've never loaded for a rifle in that caliber so I won't comment on the "best" load.

thanks.
 
Thanks everyone for all the info. Please keep the info comming. I am going to have to make a decission on what powder I am going to use today. I am out on town new to a Bass Pro that has the powders.
 
If you believe published reloading data, then LIL'GUN edges out H110/W296.

Some amateurs have tested with strain gauges and found that it is a wash.

And H110 smells better when fired.

What does it all mean?
Someday I may switch back from LIL'GUN to H110/W296.
 
14.0 - 14.5 grains 2400.
Standard primers.

That's all you need to try for a carbine load with 158 grain JHP.

Blue-Dot is slightly too fast for a carbine.
2400 will give 100 FPS better velocity.

Bullseye is way too fast for any .357 use at all, except target handgun loads.

rcmodel
 
+1 for 2400. I've used it for years. 15.5 gr. is my max load. Don't start with it.

I use magnum CCI primers with my 2400 loads.
 
the best and claenest burning powder in the whole world is VihtaVuori N-110. It takes usually 1g or 15,432gr for the best result. ;)
 
My Marlin rifle loves 13.0 grains of AA#9 with Hornady's 158gr FP/XTP bullet. The FP/XTP is designed for higher velocities from a rifle. I use RP brass and CCI 500 (not magnum) primers. The overall length of the loaded round is
1.580" This load comes from Accurate Arms data but it is not a starting charge. Start lower and work up to it. For your rifle I'd stay with Win 296, H110, AA#9, 2400, or Lil Gun powder. Don't even try Bullseye. When you consult loading manuals you'll get conflicting maximum charges. For instance Hornady says 11.5 grains of AA#9 is maximum using WSP Magnum primers while Accurate Arms manual #1 says 13 grains is max with CCI 500 primers, and Accurate Arms data available at their on-line site says the maximum with AA#9 using CCI 500 primers is more than 13 grains. Follow published data using the components specified. All I know is 13 grains of AA#9 shoots well in my rifle without any pressure signs.
 
if i was loading that round for a rifle i'd go with 2400 too .... 15-16 grs should be a great load in a rifle length barrel........
 
A couple quick thoughts-

1. If I was stuck with only one powder for use in 357, 41 and 44 mags as well as my 45 colt loads, it'd be 2400. No question.

2. The exact powder charge of 2400 under a 158 grain slug in 357? I use 14.8 grains under a 158 jacketed slug, speer GDHP to be exact. Or 15.2 under a 158 HCSWC, usually a laser-cast slug. Be advised however, that any charge above 14 grains is above most current published maximums. So go slow and careful. And use a chronograph.
 
I've come to like AA#5 for my .357 Magnum loads out of my GP161 - can't speak for rifle loads. Lee manual shows 8.1 grains under a 158 cast lead bullet. My Lee disk seemed to throw a slightly heavier charge - about an 8.3 consistantly. It shoots very well.


Q
 
I'm new to loading .357 myself, but 2400 so far seems to be working well through my GP100. I'm up to 13 grains for 158 hornady XTP's and 11 grains for 180's.
 
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