9mm Bullet for .357 Magum

My MKIII Hi-Power barrel slugs .358 and I get good results with cast bullets sized to .360.

Go past what's on the label, get a gunsmith to use pin gauges to measure your cylinders and slug the barrel.

there sure is a lot of misinformation on this thread.
 
Using 9x19mm bullets in a .357

I've been using 9x19mm AND .380 bullets in several .357's for close to 40 years without problems...

Usually use 88g JHP and 95g FMJ .380 bullets and 115g JHP and 124g JHP 9x19mm bullets...

Used in a variety of different guns including Colts, S&W and Rugers without any problems...

Accuracy usually was less but only slightly less, NOT enough to worry about...

Velocity needs to be kept within limits of the bullets to prevent leading...

T.
 
I just finished loading some .357 sized 124 grain TC GC bullets , originally cast for 9mm luger, into 357 magnum cases , a bit of taper crimp from my 9 mm taper crimp die and they shot exceptionally well in a Ruger Blackhawk.
I loaded a group with 5.5 grains of AA#5 and another group with 7.7 of AA#5.
The 5.5 showed promise, but I believe the sweet spot is going to be 6.0 grains of AA#5 , 5.5 were not quite enough and 7.5 were too much for paper target shooting.
The .357 sized bullets out shot, accuracy wise, the 158 grain SWC's I sized at .358...so try those .357 bullets...you just never know.
Gary
 
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