Answered by shots about 15 seconds later by a much small caliber handgun.
Jennings, Raven, Pheonix Arms .25 ACP sound about right?
I ain't that schooled in handguns to make those decisions.
Never got the full education on firearms from my grandfather. By the time I was old enough to start using a handgun in his opinion (besides a .22 for target practice), we were separated.
Ain't no way I am telling by sound, the caliber of a gun, although last weekend someone must have had a 9mm or .45. About 8 quick shots, followed about by a couple shots from a much, much smaller caliber gun, then 6 more from the same larger caliber weapon. And someone was shot and maybe died (didn't follow) that night. I was close enough to get a really good listen.
But I wouldn't be surprised if it were some throw away burner with a history like some crap .25 ACP.
How hot are the hollow point, 50-grain rounds? Not that you are going to do much target work with such a firearm and round, but could you realistically get much practice in?