Arkansas Paul
Member
So I was testing some loads today and had an issue with not getting a complete burn with IMR 4227.
The load was the following:
.357 magnum
158 grain Nosler JHP
15.5 grains 4227
Federal standard SPP
They were shooting fine, with reasonable accuracy but every time I ejected a spent casing, it looked like this:
Is this common with this powder?
I shot some .45 Colt stuff loaded with the same powder and got better burn. Maybe the cavernous size of the case had something to do with it.
I know that 15.5 grains is nearly compressed in the .357 mag.
Would switching to a magnum primer help? I know it's not necessary with this powder.
Or should I just not worry about it if accuracy is acceptable?
The load was the following:
.357 magnum
158 grain Nosler JHP
15.5 grains 4227
Federal standard SPP
They were shooting fine, with reasonable accuracy but every time I ejected a spent casing, it looked like this:
Is this common with this powder?
I shot some .45 Colt stuff loaded with the same powder and got better burn. Maybe the cavernous size of the case had something to do with it.
I know that 15.5 grains is nearly compressed in the .357 mag.
Would switching to a magnum primer help? I know it's not necessary with this powder.
Or should I just not worry about it if accuracy is acceptable?