I believe my 22 Hornet is a 1 - 12" twist. I would prefer it to be 1 -14" twist rate. I have not found a load it likes real well yet. It seems to shoot the light bullets; 35 grain as well as 50 grain bullets. I want to try some 1680 with 50 grain bullets, but have not yet. I just got the powder yesterday in the mail, but have some other projects I have been working on lately. I really can not tell you which one it likes best. I do know mine does not like a 40 grain V-Max at all. About the best I can do at 50 yards is 4", most of the time it is even bigger than that. I really want them to work and have tried them with several powders and primers. It became obvious, that they just were not going to work.