I use the 200 grain in my 20 now. I had issues with heavier loads. I want to stick with the stock barrel for reliability. I'm not hunting. I'm just using it for defense against bears and mountain lions. I shoot the 21 better because the recoil is more smooth.

I currently carry a Glock 20 loaded with Underwood 200 grain hard cast. I want to possibly switch to a Glock 21 in .45 Acp with 230 grain fmj. I don't like heavier bullet waits as i've had isses with key holing. I want to switch because I shoot the .45 slightly better and ammo is slightly easier to find. Inside of 50 yards will the .45 penetrate bears and hogs a good as 10mm? If not, how much of a difference is there. I realize that small and fast penetrates barriers better. And heavy penetrates flesh. I'm looking mainly at max penetration into bears and hogs and not anything else.

Are the bugs worked out of the Gen 4 Glock 20's? Might pick up a Gen 4 for the slimmer grip. I just know that the Gen 3 is proven...

I want to carry a Glock 20 in the standard configuration for mountain lion and black bear protection. What heavy rounds run most reliably in the 20? If you carry a 20 what's your defensive load? I'm looking at Underwood or Double tap. I want 100 percent feed reliability as well as no key holing.