Well .22 i could probably handle, but i dont think they use .22 for ISPC, and shooting shorter ranges indoor i would stick to PCP then, but then it would have to be nice and easy 1 shot at the time,,,,,, which also have it merits for sure.
BUT ! i am limited on a Danish pension, and while that might well be more than some people in other countries make working, then living,,,, hell any, expenses are high here,,,,, thru the roof high. I am also pretty sure a box of .22 here in Denmark, for the same money you could probably get a box of ammo for your AR15 in the states. Gasoline are about the same price here as in the US but we just get a liter,,,, one US gallon = 3.7 liter.
Also one downside for me personally is shooting ISPC i would have to join a club and thats a problem though i am not afraid of meeting new people, then for some strange reason when it come to my fellow countrymen it is a problem.
I would have 0 issues being within spitting distance of 1 million Americans or Japanese / whatever other nationality, but here at home i do my shopping very early or late in the day to not "share" the store with too many other Danes.And going to the doctor,,,,,, well i normally need a few months to warm up to that idea.