I shot 120 grain pro hunters out of my 21" 6.5x55 with a mild load of RL-19. It is on a Mauser 96 so I didn't get too carried away.

I have a cz in 6.5x55 and it will take anything you feed it from mild to wild. Mostly RL-19 in it as well. A good bullet is the 130 accubond or the 130 Sierra hollow point.

Brenden