I was getting ready to order a box of Honaday gas checks for my .38/.357 mag, and am confused by the size. I'm assuming that the .375 cal checks are .375 dia prior to sizing and could be used for a .356-.359 boolit? I'm considering the Lee DC C358-158 SWC mold which seems to have generally good review. The price is another factor. Is the .375 check the correct size for .38 cal?