All TCs are capable of take 150 grain "magnum" charges these days... 
 My 209x50 encore (IF I do my part, holds about 1.5-2in @ 100 yards) 
which obviously is more than enough for 1-200 yard kills. 
I've been looking at TCs Triumph as a second MZ, just because I want to fit one with a magnified optic... and leave my Encore blade sights only. 
CVA, IMO is good equipment, but you also have to remember that you get what you pay for. Pickup a Omega Z5 kit, or a Triumph, 
Hodgdon 777 FF grade, some Powerbelts 250-295 grain, or some Hornady SST 300 grain sabots.... 
Also, DON'T get into this  "you need a special primer" nonsense. You don't. Blackpowder is so volitle, a cigarette lighter or a magnifiying glass will do the same dang job. 
Just pickup a case of 209as, CCIs work great.... more or less because they have a little polymer(or whatever it is) cap over the primer.. 
supposedly helps prevent any water from getting into the priming compound.