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I decided to dedicate an STI slide to the Rowland conversion. I am also going to use a Sprinco recoil assembly when it ships. They have one for 460, 45 +p+, ect. The Springfield slide will be dedicated to the .45 APC. I had to readjust the sights between the cartridges and maybe I am lazy but I like to set and forget. I am now in the process of fitting the STI slide to the Springfield frame. The 45 slide shoots too well to use any lapping compound with the STI, so I am going very slowly and checking fit a bunch. I milled some bar stock as close as possible to the frame rail dimensions and am working with that. Then I go to work on the barrel fit!

The conversion worked very well. I installed the 24 pound spring but have read elsewhere that the 20 pound spring is recommended for stainless models. My first shot didn’t count because I fired with my left hand and basically ducked under the bench. Maybe I am over cautious but I still have all my fingers, both my eyes, and a healthy respect for high pressure. I settled into the sight picture after the theatrics and found the pistol easy to shoot. I only fired from seven yards and all bullet holes were touching. I need to install a lower front sight because the groups were 1.4 inches lower than point of aim, and I had my rear sight tightened down. I did not notice any unusual stress markings on the slide or frame but 25 rounds is early in the testing process.

Thanks for the input. Tomorrow is the day I test the 460 with the 200 grn XTPs. I only loaded 25 behind a weighed 12.2 charge of Power Pistol. I am going to a public range and they do not allow a chronograph. I mainly want to test the function of the Clark drop in kit. Thanks again!

Today I installed the Clark drop in kit on my Springfield Mil Spec Stainless. I had already replaced the sites with a fiber optic slotted front and an adjustable BoMar cut rear. That 24 pound spring is certainly an ordeal. A little blood, a bit of searching, and some cussing later I got everything together. And then I took it apart and did it again. And again. Not a sucker for punishment, but I learn best by doing. It does get easier.
I plan on loading 200 grn XTP’s in front of Power Pistol for a trial run. I am building this pistol for deer hunting here in Missouri. Any tips would be appreciated!