Depends on what your rifle is rated for. Most rifles today are rated for 150 grains of pellets, but some are rated for only 100 grains of loose powder- doesn't completely make sense to me, but hey, it's their company. CVA's are only rated for 100 grains loose. TC & Knight are rated higher, but I don't know for sure if they are rated up to 150 grains loose powder. The max load I see most guys using is 120 - 130 grains loose powder or 150 grains worth of T7 or Pyrodex pellets.