Quote:
Originally Posted by HorizontalMike
Please do not confuse my use of a .357 gun to shoot .38 Special cartridges. It is STILL a .38 Special cartridge, even when shot out of a .357 gun, and those 38 Special cartridge limitations are from 5.6gr to a max of 6.2gr, and at 7.2gr in a 38 Special cartridge it is WAY OVER the max limit. In other words it would produce way too much pressure during combustion, and quite possibly blow the cylinder, if not the barrel as well.
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Modern 38 Special brass is much stronger than is necessary for the loads it is called upon to contain. The reason 357 Magnum brass is 1/8" longer is not to create a case that can handle Magnum loads better, 357 Magnum brass is 1/8" longer to create a case that can not be unintentionally chambered in 38 Special revolvers
There is just no way that load would blow up a 686 cylinder. Your cylinder is simply not a possible point of catastrophic failure in this scenario
The pressure generated by your load is way below 357 Magnum proof levels let alone below 357 Magnum loading levels.
In a worst case scenario if you used 38 Special brass that has been reloaded many, many times might experience a case split, but that could also happen with 357 Magnum brass that has been reloaded many, many times