I have a quantity of .357 magnum cases that I would like to load to the same level as my .38 Special cases with 158 grain semi-wadcutters and Unique powder. My .38 load is 4.1 grains of Unique. I looked in my loading manuals for an equivalent load, but could not find one. I had thought that I would load somewhere between 4.5 grains and 5 grains of Unique. I know this is probably a no brainer, but I was somewhat surprised that no manuals, even the Lyman Cast Bullet manual did not list such a load.
Does anyone see a problem with 4.5 to 5 grains of Unique in a .357 magnum case with a 158 grain lead boolit? I only ask because light loads, such as those used in cowboy action shooting have been known to blow up guns as often as heavy loads, or so I have heard. Thanks.
exile