Glock
G20 guy myself, though I acquired it while searching for a Delta. Put a 3.5 connector in it, and carried on. For a while, the G20 got carried and talked about more than I ever shot it. Last couple of months, I've been carrying it to the range about every trip, no matter what else I'm doing, and running at least 1 mag through it.
Bamaboy did a brief stint with it, 2-3 matches, loaded down during his initial step up from a .22 Ruger. For him, we loaded it to sub .40 SW energy, and it still ran fine. For full power loads, had a small issue with a component change that gave me a really spooky high pressure experience, but got that figured out and back to nomal.
Normally, I don't run the G20 full bore, more like .40 SW +P.......a 180 truncated FMJ at about 1100 fps +/-. When I attempt to slay Bambi with it, I load it with factory ammo, Hornady 180 JHP, or more recently W-W 175 SilverTip. Have thought about getting a G21 slide and mags to have a switch slide arrangement, but have not done so.