Before you can expect top accuracy, you will probably need to break-in the barrel. They tend to be a little rough as they come from the factory. I like to use high speed, copper wash stuff to smooth and burnish the barrel. 500 to 1000 rds. may be necessary. Your CCI MiniMag should be fine. After that, you can expect to shoot lead, standard speed stuff well, with little to no leading.
617s make great surrogate guns: guns in the same barrel length and nearly the same weight that substitute for centerfire guns. With price and availability of ammo being what it is at the moment, I shoot a lot more .22 than anything else.