[MikeG21]

Would like to be able to fire heavy led rounds (e.g. Buffalo Bore .45 +p 230 grain FMJ) from my Gen4 G21 for wildlife protection (black bear, cougars) when I hunt. I assume I need an aftermarket barrel to handle a heavy round like that? If so, what do you recommend?

[kb18no1]

You might wanna reconsider using 45acp for black bear protection. 45acp is a slow round and lacks penetration on bears. They have extremely thick fur, a layer of fat and very strong bones. 10mm, 41 mag, 44 mag, etc are much better suited.

[MikeG21]

Yes, yes, I'm aware .45 is not the best for black bear protection (Though I think a couple head shots to a bear would do the trick). To be honest, it's mostly for cougar protection. I have a lot more confidence in hitting a big, charging black bear with my 30-30 (primary hunting weapon) than I do with a fast, agile cougar (hence why I will be carrying my new G21 with me this year as a sidearm).

Regardless, I'm just looking for info on a good aftermarket barrel

[bigtimelarry]

KKM Drop in if a aftermarket barrel is what you need.

[PghJim]

Originally Posted by bigtimelarry

KKM Drop in if a aftermarket barrel is what you need.

I agree! The KKM supports better than stock.