Inebriated
Member
Personally, I'd opt for the Glock 20.
You're in a group. That alone goes a long way in bear encounter prevention. You say many will have spray. I wouldn't be overly-concerned.
But hear me out on the 20, here, and look at Underwood's loads..
Their 180gr HCFN 357 is listed at 1400fps, 783 ft. lbs.
Their 220gr HCFN 10mm is listed at 1200fps, 703 ft. lbs.
Consider, also, for the sake of comparison, that their 180gr 10mm is listed at 1350fps and 728 ft. lbs.
The difference is minimal. The SD of the 220 10mm is .196, the SD of the .357 180 is .202. Negligible. The difference to me is trigger and ease of use under pressure, and that goes to the G20. And of course that data is adjusted for barrel length, but I'll say this... In my past research about 357 Magnum vs. 357 SIG and 10mm, the autos are always more efficient in a gun of a comparable size (because we all know revolvers suffer from the cylinder gap). So if you compared that 4" GP100 to a 5.6"+ G20, the gun size is the same, the ballistics are incredibly similar, and the overall weight is likely about the same. Plus, you get an easier trigger with the G20, which could make a difference under stress.
Of course neither compare with .44 or hotter, but in a direct comparison between the GP100 and G20, the winner is the G20 for me.
And a note on Glocks... you need an aftermarket barrel to shoot lead bullets reliably. Hickok has a good video on Glock's factory barrel; It just doesn't stabilize them. So if you're going the G20 route, keep in mind the cost for a new barrel. It may be worth sourcing a .45-10 barrel for your G21.
You're in a group. That alone goes a long way in bear encounter prevention. You say many will have spray. I wouldn't be overly-concerned.
But hear me out on the 20, here, and look at Underwood's loads..
Their 180gr HCFN 357 is listed at 1400fps, 783 ft. lbs.
Their 220gr HCFN 10mm is listed at 1200fps, 703 ft. lbs.
Consider, also, for the sake of comparison, that their 180gr 10mm is listed at 1350fps and 728 ft. lbs.
The difference is minimal. The SD of the 220 10mm is .196, the SD of the .357 180 is .202. Negligible. The difference to me is trigger and ease of use under pressure, and that goes to the G20. And of course that data is adjusted for barrel length, but I'll say this... In my past research about 357 Magnum vs. 357 SIG and 10mm, the autos are always more efficient in a gun of a comparable size (because we all know revolvers suffer from the cylinder gap). So if you compared that 4" GP100 to a 5.6"+ G20, the gun size is the same, the ballistics are incredibly similar, and the overall weight is likely about the same. Plus, you get an easier trigger with the G20, which could make a difference under stress.
Of course neither compare with .44 or hotter, but in a direct comparison between the GP100 and G20, the winner is the G20 for me.
And a note on Glocks... you need an aftermarket barrel to shoot lead bullets reliably. Hickok has a good video on Glock's factory barrel; It just doesn't stabilize them. So if you're going the G20 route, keep in mind the cost for a new barrel. It may be worth sourcing a .45-10 barrel for your G21.