My daughter's boyfriend has a firestorm .45 sort of a 1911, but not a direct copy. The 1911 magazines work, though. I shot it. It was 100 percent with ball and 200 grain cast SWC and shot well which I can't say for at least one 1911 I had, an Auto Ordinance. I had an AMT hardballer that WOULD shoot the 200 grain SWC load, the Auto Ordinance was ball only. I had a 220 grain cast round nose handload it'd shoot, actually a Lee mold for a Ruger Old Army cap and ball. Got the hollow point version, too, that worked because the cavity isn't very big.
Anyway, for the price of that firestorm, it worked quite well I thought. I didn't try any hollow point in it, but I wouldn't carry it anyway for self defense, rather carry something lighter and DA.