BigNate
WKR
There are quite a few videos on u tube comparing different bear defense ammo in all the popular cartridges.
Energy numbers don't mean much, but penetration does. In every test, in 10 %, 20% gel the heavy for caliber penetrates best. The 9mm did best with 147gr hard cast, 10mm did best with 200gr hard cast, as did 45 ACP, 45 Super, 44mag, 45 LC. Etc...
Do a little research, pick one, try to shoot it enough that you can actually make good hits. Noise does nothing.
Energy numbers don't mean much, but penetration does. In every test, in 10 %, 20% gel the heavy for caliber penetrates best. The 9mm did best with 147gr hard cast, 10mm did best with 200gr hard cast, as did 45 ACP, 45 Super, 44mag, 45 LC. Etc...
Do a little research, pick one, try to shoot it enough that you can actually make good hits. Noise does nothing.