My 788 liked the 50g sx with RL7, when I ran out of those during one of the droughts a bunch of years ago, I tried the 50g TNT's with H322. Woodchucks didn't care for either. The 50g sx also shot well with H322. The Sierra 50g (#1330) were a little hard at .222 velocities, the other two are more explosive.
Mike
Mike