Yes - removable 5-round box magazine. An aftermarket single-shot conversion is available.
The twist rate is 1:12 I double checked when I cleaned it the first time. For $230 more I could have had the kevlar-stocked version with 1:9 -- but I was too cheap.
No, so far, all I do is unload ammo -- out the business end.
I was hot to trot to get myself reloading equipment, but when I checked, there were no primers or powder available to reload, even if I had the brass, bullets, dies and press. Future project if the "drought" ends. Until then, I will just unoad some of the 55gr FMJ I have stockpiled and stay away from heavier rounds. I do have a back order for 1000 small rifle primers. When they are available, I will also get some powder, a brass tumbler, some light target loads, and probably a Dillon 550B turret press, so I can also reload some of my other long and short man toys. Current conditions have modified my shooting behavior back towards my powder burners. But to be cool, one must achieve a well-rounded and proper balance, I think, including air rifles, high-power rifles, rim fires, shotguns and pistols.
PS: Peak - If you will ever come to SC for a visit, I will let you shoot my CZ's and play with my puppy.