jeff100
10-17-2017, 03:29 PM
I'm loading up some ammo for my Ruger BH .357 magnum revolver using Lee 358-158 cast boolits powder coated and sized to .3590" diameter (size after PC). I test fit my boolit to the cylinder chamber and it is an interference fit, does not drop through the cylinder opening. Cylinder opening (where the bullet exits) measures .3585. Bullet hardness is 16.6 brinell tested with my Lee hardness tester (divot = .056"). I know these boolits will swage down when fired and I want them slightly oversize for a good fit. I'm loading with Accurate #5 to create a 'target' load, max load being tested is 8.0 grains, .8 grain below the max load in the Accurate manual (8.8 gr).
My question is will this oversize condition cause chamber pressures to be unusually high? I don't believe this is a problem as long as the boolits are seated deep enough and the cartridge OAL doesn't jam the boolit in the cylinder, but I don't have a lot of experience with cast boolits & wanted to check with other experts for a second opinion BEFORE I load up this ammo.
Thanks all...JJ
My question is will this oversize condition cause chamber pressures to be unusually high? I don't believe this is a problem as long as the boolits are seated deep enough and the cartridge OAL doesn't jam the boolit in the cylinder, but I don't have a lot of experience with cast boolits & wanted to check with other experts for a second opinion BEFORE I load up this ammo.
Thanks all...JJ