I have owned a few Guncrafter Industries 1911s, both in 45acp.
I knew Alex created a 50 GI cartridge for the a model 1. I recently
stumbled across a listing for a GI conversion for a Glock 20/21
Seller had sent it to Robar, barrel & slide coated with NP3. Also
got a bit of ammo with it. Alex offers loads in 185, 230, 275 & 300 grains.
Below is a comparison of a 45acp Gold Dot with a 50 GI, both 230gr