Bledsoe, Our .375s are probably more alike than our .38-55s. In my .38-55 I use the .377" sizer with results that please me very much. I expect to use the same size bullets in the .375. So far the only cast bullets I've put through the .375 have been some of the old Ideal #37583, the .38-55 short range bullet and those worked very well. Give me time though, it might be a while before I get around to giving those heavier bullets a good try.
