You don't need an aftermarket barrel for even the hottest loads. DoubleTap ammo uses factory stock G-20's to test their hottest loads. I've been using their ammo, 200gr@ 1300 fps for a while in a stock barrel with no problems. That 1300 fps is actual chronographed with the factory 4.5" barrel by the way. A longer barrel for hunting wouldn't give you enough more velocity to matter. But in some places they require 6" to meet legal requirements. I'd not waste the money on an aftermarket barrel unless required to do so by law.
The only real problem with chamber support was with very early G22's in 40 S&W. Glock corrected that problem years ago. It has never been a problem with any other caliber Glock. At least no more so than with any other gun maker. They all leave a small section of unsupported chamber.
The only real problem with chamber support was with very early G22's in 40 S&W. Glock corrected that problem years ago. It has never been a problem with any other caliber Glock. At least no more so than with any other gun maker. They all leave a small section of unsupported chamber.