I have a couple of G20 builds, I use longer aftermarket barrels with increased head support. 10mm might be better than nothing for a critter defense cartridge, I'd personally opt for a Lehigh defense extreme penetrator going as fast as possible. On that note, I would chrono whatever you use so that you get a realistic idea of your velocity/range/energy limitations.
sorry--got this confused with the bear defense thread where someone mentioned 10mm.
