Anyone have a favorite cast bullet load for a 375 winchester. I have a Marlin lever action rifle with the micro-groove barrel. I have a Saeco mold which casts a 210 gr rnfp non-gas check bullet. I have also purchased some 262 gr rnfp that can take a gas check, they have not yet been sized or lubed. I also have some 240 gr lasercast bullets that are sized at .380 for the winchester 38-55. Can I use these or do I need to size them down some first? Any information would be much appreciated. Thanks.