RE: 45 or 50 cal
I have shot the 45 for about 25 years and have no complaints.
just got two new CVA 45 this year sone for me,one for my wife.
I shoot 225 grain power-belt bullets with 3 pyrodex 50 grain pellets.
you get more ,flater range with 45 than you can with 50's.
50 is the way to go if you want to go for moose or other country game.
45 works good on all else.
thats my 2 cents,there are 98 more.
I am not a hunter I am a whitetail population reduction specialest
remember keep your back to the sun, your knife sharp, and your powder dry.