I have a G20 Gen 4, 22# recoil spring, 6 in KKM barrel. I shoot 180 grain Delta Precision hollow points, 9.0 grains of Longshot, Starline brass, Federal primers. I get 1250 fps in the stock barrel, 1361 fps in the 6" KKM. I get similar increases in velocity between the 2 barrels with other loads as well.
Example-Factory loads
Speer 200 grain Gold Dot 1036fps/1128 fps
Underwood 180 grain Gold Dot 1226 fps/1306 fps
Handload, Montana Bullet Works hard cast 200 grain
1161 fps/1311 fps
Rather than running super hot loads, you can pick up around 100 fps and 100 ft lbs, simply by changing your barrel and not sacrificing reliability.
