H110 / 2400 both work well but...

[fourdollarbill]

In a 357 mag I load 125gr JSP Sportmaster's with either 17gr of 2400 or 21.** of H110. Both are nice and accurate but when shooting the 2400 seems to really spray debri out the BC gap and I can feel it on the face and the people beside me start to move away. No spray problems with H110.
I use a 6" GP100 and the BC gap is very nice "not measured" but you can tell by looking that it is good.
Is this a typical for 2400? Do you have the same?
I have only tried one thing to resolve it and that was to use mag primers with the 2400 but i was the same.

" Dear Lord, please let the "Flame Cutting Comments" fall to broken keyboards" Amen.

 

[Russt]

I shoot that 2400 load in 4 different revolvers, SP101 3", GP100 4", Speed Six 4", & Security Six 2-3/4". It's an accurate load in all 4 but I've never noticed any debri spraying out, a lot of muzzle blast though. I'd check the gap with a feeler gauge and if that was good I'd make sure I'm getting a heavy crimp on the bullet.

 

[fourdollarbill]

Well I guess it could be muzzle blast debris, I'm just assuming it is out of the gap because it sprays the face.

 

[ArchAngelCD]

I've noticed the same thing when loading 2400 over W296/H110. I'm not sure where the spray is coming from though, but it's there.

 

[ljnowell]

I think its because 2400 tends to be a little messier, perhaps unburned, or rather still burning powder. Seems h110 is loaded in such a tight window, but in that window its combustion is much more effiecient than that of 2400.

 

[ArchAngelCD]

That is entirely possible ljnowell, sounds right...

 

[Doug b]

I've notiiced this to with these powders and unique.Went to a 158gr.bullet and it went away.

 

[GP100man]

It`s "burn time "within the time the base of the bullet gets to the gap .

The 125 is shorter& liter , so time is shortened , don`t ask me to measure it though!!

 

[Maj Dad]

That's why I stopped using it in my 357s & 44s. No such issues with 296/H110, and it gives me my best accuracy in hot loads. Works great in my 30/303/8mm cal rifles with cast bullets, though - superb accuracy & clean burning.

 

[Slamfire]

I used to shoot 125's and 17.5 grains of 2400.

I got huge fireballs and lots of noise.

I think half the powder is burning outside the gun.

It was accurate and ate the forcing cones on my revolvers.

I got over that phase.

 

[Husker_Fan]

I had the same issue with 125 jhp and 2400. No issue with 2400 spraying with 158 SWC or 180 rnfp. I don't know if it is the length of the bullet or the greater inertia to overcome due to weight, but the little bit of extra time it takes for the bullet to move past the BC gap seems to let 2400 burn more completely.

 

[GW Staar]

Don't throw away your 2400. It works great for 7.62x39, and 30 Carbine.

 

[Jeff H]

No issue with 2400 spraying with 158 SWC or 180 rnfp.

+1 on the 158SWC. I've shot a countless number of these without any issues. No spray at all using 2400.

 

[ReloaderEd]

I agree with heavier bullet and cromped heavier. I have a 44mag same problem with W296 and H110. Went to magnum primers and problem went away, also, accuracey improve imensely which was my problem in the first place. I really believe in AA10 AA8 and AA5. You won't have that problem with Accurate Arms stuff. AA10 is the only double base powder in production today. M1 carbine to as big a whoop de do that made its great!!!!

 

[ReloaderEd]

Oh yes if only Hogden still made H240 which came from pulled military ammo I believe. That is still the best.

 

[ArchAngelCD]

I really believe in AA10 AA8 and AA5. You won't have that problem with Accurate Arms stuff. AA10 is the only double base powder in production today. M1 carbine to as big a whoop de do that made its great!!!!

AA10?? AA8?? I have not seen those powders. I know Accurate Arms makes AA9 and AA7 along with AA5 and AA2 but AA10 and AA8???

 

[Ozarkrick]

For 357 mag / 125 JHP's I tried 2400, bluedot, 296 - but the blast was too much for accurate shooting. I settled on 7.8 grs of Unique - accurate and comfortable in both 586 6" and 686-4". Good luck