YES! For a .50cal, there are T7 - 50/50 and also T7M - 50/60. DO NOT USE 3 OF THE MAGNUM PELLETS, which would equal a 180gr charge. You would be way over charging your rifle, endangering yourself and others who may be around you.

Now if you're EXTREMELY careful, you can mix the two different pellets for a 10gr equivalent change. Such as 1/50 and 1/60 which would equal 110grs. Or two of the 60gr pellets which would equal 120grs. I'd encourage due diligence if doing so.