what caliber are you wondering about? i just looked online and the 30-30 wasn't listed for the managed recoild rounds. you don't really need it with a 30-30.
I fired a box of them in a .30-06; the recoil was about like that of a 30-30. They seem to hit a little high, compared to the full-power cartridges I'd shot already, but overall, I was very pleased.