Picked up my latest addition on Tues. and got to the range on Wed. It was a beautifully warm day for Indiana this time of year (sunny, 5mile/hr breeze approx. and 50+ degree F). I shot a couple different .45 Colt loads (240 gr.lrnfp 750fps, 260jhp 850fps and .454 Winchester 250 gr.) The 2 .45 loads were from Georgia Arms Ammo. (I can heartily recommend them). The Cowboy load felt like .22 mag. from my 5.5 Super Single in perceived recoil the 260grn. jhp felt like 158grn. .357 from my 4" GP100 and the .454 surprised me.... Every person was claiming these had unbelievable recoil... granted this particular load is probably light in comparison with a 300grn. or larger bullet but it compared roughly in MHO to shooting 125 grn Speer Gold Dot .357 from my 2" Rossi. I think I'll continue to shoot .45 Colt mostly as they were incredibly nice and continue to work up to the stout .454 loads that are available. BTW I was ringing the 50yd gong easily with 260 grn loads ,100yds hits were much harder and fewer at this point but, I'm gonna keep on tryin'...The gun has a 7.5 barrel and will be cleaned between the Colts and Cassull's...