I recently bought a G20 and have been doing load development with 200gr hardcast gas check bullets from Montana Bullet works. I've tried Blue Dot, HS6, Power Pistol and 2400, with Blue Dot the clear winner so far. MBW has two different 200gr bullets, so I am now trying their NOE gas check version.
The charge weights I have seen listed for Blue dot on the internet have been over book max, at least my books, so I am likely slower than what is posted all over. Next step is to chrono the winning loads and see where I am at.
The G20 is stock with the exception of a 20lb recoil spring, which seemed to tighten things up a good bit.
