I'm going to go with imr-4227. Good in 357 mag- 44 mag- 45 colt in any new production guns- 44-40-. Then rifle 30-30 is OK 7.62x39r is good 30 carbine-22 hornet- I have worked up a load close to standard velocity in a .223- I'm sure it would work with lots of other smaller case high Powers and I'm sure older cases that shoot lead bullets like the 45-70.