Alliant 2400 & Berrys 125 grain 357 Magnum Flat Point?

[THEWELSHM]

Alliant 2400 & Berrys 125 grain 357 Magnum Flat Point?
I typically load with AA#9 and treat a plated bullet like a lead bullet of the same weight. Anyone have a load for the above, I will be using CCI 500 Primers,with AA#9 I would use 15 grains, Im told the 2400 is very similar powder but max load would be 17.5?

thewelshm

 

[kcofohio]

If you load max with 2400, for a 125 gr. plated bullet. Even out of a 4" barrel, you will way too far exceed the recommended 1250 fps max.

But, yes, 17.5 gr. is max for a 125 gr. Speer GDHP.

 

[THEWELSHM]

So My thinking is is use the 15 grains as I do with AA#9 with the Alliant 2400 ?

thewelshm

 

[Steve C]

Plated bullets like those made by Berrys, Ranier, and others have a relatively thin platting. They are designed for a lead free or low leading target loads and not for full power magnum fodder. If you want to shoot a full power load using a slow powder like AA9 or 2400 you should purchase a thicker plated bullet like the Speer Gold Dot or a conventionally jacketed bullet.

I don't waste slow powders on cheap bullets in magnum cartridges used for practice. Any of the faster powder you can get data for will provide a lower cost load for the .357 magnum and keep the muzzle velocity to an appropriate level for typical plated bullets.

 

[eldon519]

Part of the issue with plated bullets is that you can't really crimp them very well for slow magnum powders. Have you tried coated cast bullets like those from Bayou Bullets? They work pretty well at magnum velocities and still have a real crimp groove.

 

[THEWELSHM]

I think I'll stick with my cast lead for the 2400 and get some different powder for the plated bullets..

Thewelshm

 

[forestswin]

The welshm
I'm curious, assuming this is for 357 revolver, have you shot 125 grain bullets before in it?

If so, have you seen any flame cutting of the top strap?

 

[eldon519]

I've shot plenty of 125s without any observable flame cutting. By that i mean several thousand. Now forcing cone erosion is another matter...

 

[ColtPythonElite]

I have a revolver that had seen over 30k hotter 125 gr rounds. It has a very slight flame cut line. It has no measurable amount of forcing cone erosion.

 

[THEWELSHM]

I shoot a 27-2 with 125 drain usually XTP or my own cast lead. No cutting or forcing cone issues. I shoot my model 19 with 158 gr

Thewelshm

 

[eldon519]

Mine is a GP100. The forcing cone erosion could be from shooting lots of 125gr Blue Dot loads. A year or two after I quit shooting it so much, Alliant put out a safety notice stating Blue Dot should no longer be used with 125gr loads in .357.

 

[ColtPythonElite]

Probably 15k of my 125 gr loads were Blue Dot loads. I used them for 1992 until I discovered that oddball warning.