How much does that plastic jammamatic weigh? I've fired a 10mm Glock and it was a rather large weapon. My .45 colt weighs about 40 ounces, not any more than a 1911 goverment that soldiers have packed in combat, with it's 4 5/8 inch barrel. It is a Ruger Blackhawk in stainless. I shoot 18.0 grains of 2400 behind a 300 grain hornady XTP and get 1256 fps for 1050 ft lbs. It shoots 5 shot 2" groups at 50 yards out of a rest. It's still packin' 756 ft lbs at 100 yards! Stuff that in your G20 and smoke it.
It's a little heavier than a good .357, but you cannot argue with it for either kenetic energy, or the bullet if you're a big bullet fan.
You may need pain killers to shoot it, I don't. I burn a box or two at the range and it's no biggy. Single actions roll in the hand, don't punch the shooter.
EDIT
I went and looked it up on the Glock website, unloaded weight with magazine about 30 oz, lighter but not much. I reckon 16 rounds of 10 probably weighs about what 6 rounds of 105 howitzer...er....45 colt weighs. I'm 52 years old and if I was in bear country I could handle the extra 10 ounces. I've carried this revolver all day on quite a few occasions.
However, for all around outdoor use, I'd still rather have a medium frame .357, and that all titanium tracker sure would be LIGHT.
We ain't got bears down here. When I have carried my .45, it was just because. Besides it's a pretty gun, freaks out the other guys on a lease when I'm in hunting camp. Get lots of ooohs and aaaahs.
I reckon if I get to go to New Mexico next year, I'll carry it just for that reason. LOL