357 load has lots of flash

[300Whspr]

I think they're all hard on the gun if used excessively...

LOL

 

[Rodentman]

My best .357 flash is from the Coonan:





I used 18.0g of 300-MP with a 158g JHP

 

[Steve C]

Lots of slow powder behind light bullets = lots of muzzle flash. More powder = more burning material so more flame. All that flame and hot gasses will burn a nice grove in your revolvers top strap between the cylinder face and the forcing cone, its called gas cutting.

If the flash bothers you or you want to minimize gas cutting go to a heavier bullet with the appropriate lower charge of powder OR switch to a faster burning powder than what you are using, see Burn Rate Chart

 

[Buck13]

From my revolvers, my memory is that AA#9 has fairly low flash, but it's been a while since I shot any, so I may be wrong. I never notice flash with IMR4227, just a cloud of smoke and partially-burned powder, but my velocities lag behind the book values a bit, so they don't match 2400 velocities, let alone H110. I shot a few rounds of a moderate load of Longshot yesterday, and noticed no flash. It was cloudy and dim enough that 2400 produced a very obvious flash even at the outdoor range. I was not looking for flash from Longshot, so I might have overlooked it if it was not TOO dramatic.

If you want less flash, maybe try one of those.

 

[TimSr]

Looks to me like the OP was most just concerend about whether the flash was normal, or if it would hurt anything, and not so much looking to "fix" it, and the answer is, it's normal, size and color varies between powders. Carry on!

 

[RealGun]

Since this is your "first revolver", I feel I should ask if you are using enough crimp, sufficient to show a decided "roll" at the case mouth. This will affect ignition.