I am looking at this cartridge over the 375 cheytac . But does anyone offer this caliber loaded with the 414gr gs projo or is this a handload propristion only ? as the 375 cheytac i see betram brass makes the cases for it and found it loaded . but what about the 375 vm . havnt heard much about it but looks promising .Its sunday so i know every one is closed and cant answer me .