I haven't seen anyone mention Alliant Power Pro 300 MP. I haven't loaded it in .357 yet but will definitely be trying it out in the future. Like 2400, 300 MP does not require a magnum primer.
Powder help for 357
- Thread starter tesoro
- Start date
Just my opinion but I think 125 gr bullets would be a poor choice for shooting at 100-150 yds. They will shed velocity much faster than 158 gr bullets.
Not to hijack your thread, tesoro, but are you shooting that 686 off a rest or free standing?
venomballistics
Member
I've worked with it nearly 10 years ago. Good stuff.
But it's another alliant powder, and they have a lot of atonement to do before I give them the nod.
cowboy4evr
Member
I would also recommend Accurate 4100 / Ramshot Endorcer . They are the same , just in 2 different labels . It's right there with 2400 , just a bit slower burn rate and it meters well . I have used it quite a bit and really like it . It's also readily available . Regards Paul
There's a lot of powders out there now that will work, but for years 2400 was my go to for upper end loads. It's now 296 or H110 others have mentioned. I forgot to add that I've been playing around with Vihtavuori N110 in 357 and 44 magnums lately. So far I like it.
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There's probably a reason for that...
Alliant used to be with the most available powders, at least around these parts. They seem to be cutting back on some of their formerly popular powders. Especially 2400. Years ago it seem like they were pushing BE-86 for everything. I think they'd be happy to supply one powder.
Alliant used to be with the most available powders, at least around these parts. They seem to be cutting back on some of their formerly popular powders. Especially 2400. Years ago it seem like they were pushing BE-86 for everything. I think they'd be happy to supply one powder.
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Of course...
...results may (will) vary. But if I were going for velocity, I'd surly try a pound.
...results may (will) vary. But if I were going for velocity, I'd surly try a pound.
I always been a V V fan. I just looked up N110 and on the V V site the load for 158xtp is 13.5 -16.3, a 3gr spread for 1400-1600 fps WITH small rifle magnum primers. 7in bbl
Now with AA-9 same bullet is 12.4-13.8, a one grain spread, for 1200-1360 fps with small mag pistol primers. 6in bbl.
An extra inch of bbl should only give you about 50fps gain.
Big diff here. What gives?! Hodgdon conservative pressure for j &k frame 357 ? and V V is for L frame and other beefy frame revolvers?
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Eddie Southgate
Member
2400 has not been discontinued .
besshoudini
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I been using aa9 for a long time.
not quite sure what you're asking, but they are 2 different powders. And imo V V tests their pressures differently
spencerdiesel
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I’ve chronographed 300MP, Lil Gun, 2400, HS6, BE86, and VV 3N37 in .357 mag out of a 4.2” GP100.
All load data used came from Sierra no. 6
BE86 gave the highest velocity by far with 125gr XTPs, and good accuracy at several ladder points. 1475fps 10 shot avg, and that’s with a ridiculous .009” BC gap. To be fair, I haven’t tried 125 grains with Lil Gun or 300mp yet.
With 140gr XTPs, BE86 was very close to HS6 & 2400 for velocity:
HS6 1376 fps
BE86 1406 fps
2400 1355 fps
3N37 1288 fps
Im very (pleasantly) surprised at how fast & accurate the mid burn powders (especially BE86) are with 125 & 140gr bullets in .357 mag. And the difference in report/ blast between the mid powders and the slow powders is staggering.
I can’t find a reason for myself to load the slow powders when using light bullets in .357 now, I never would have guessed the mid powders to excel in that scenario. Of course in long barrels I expect the slower powders to reverse the roles.
All load data used came from Sierra no. 6
BE86 gave the highest velocity by far with 125gr XTPs, and good accuracy at several ladder points. 1475fps 10 shot avg, and that’s with a ridiculous .009” BC gap. To be fair, I haven’t tried 125 grains with Lil Gun or 300mp yet.
With 140gr XTPs, BE86 was very close to HS6 & 2400 for velocity:
HS6 1376 fps
BE86 1406 fps
2400 1355 fps
3N37 1288 fps
Im very (pleasantly) surprised at how fast & accurate the mid burn powders (especially BE86) are with 125 & 140gr bullets in .357 mag. And the difference in report/ blast between the mid powders and the slow powders is staggering.
I can’t find a reason for myself to load the slow powders when using light bullets in .357 now, I never would have guessed the mid powders to excel in that scenario. Of course in long barrels I expect the slower powders to reverse the roles.
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I just started loading .357 and am using Tite Group and some Unique with good results. These loads are all with 158 GR. and are for plinking. Friend has a Martini Cadet in 357 and these loads area going through his rifle mostly.
I use a lot of H110 and I used to use even more 2400, but another powder I've had good luck with is Power Pistol with 125 gr. bullets. It will get you 95% of what you can reach with H110. I usually get at least 1400 fps in 4" guns and 10.0 grains is a lot less "blasty" than H110 or 296. It's almost like shooting the milder 158 gr. loads. And Power Pistol seems to be on the shelves these days.
Longshot is my 'go-to' for service-to-+P heavy bullet loads in 45 ACP, 45 Auto Rim, 38 Special, 44-40, and service 40 S&W. It seems to like a little pressure.
