I too recently joined the M58 club. Photos of my gun are located in another thread I started when I got the gun.
I reloaded some bullets for this gun, but I haven't gotten it to the range yet. I used AutoComp powder and 215 LSWC bullets. The powder charge is a middle of the road charge. I will load a few full strength loads after the first range visit. I rarely load full strength loads for any of my handguns. I do not need to push a bullet to it's max when shooting holes in paper at 15 yards.
After buying my first M58, I can now understand the sub culture love for this weapon. They are pretty darn sweet.