Just installed the semi drop in in my 5" gun on Friday and shot it yesterday at the range. Put 10 rounds through it...115 grain Winchester....and then sat down at 25 yards, set the gun on a bag and pushed out 5 rounds for this......
I didn't take a great deal of time but didn't rush it either. The gun is considerably more accurate and POA/POI did not change at all for me. Install was not quick! I have a cerekoted slide and it made things less than fun. Install time was about 3.5 hours but I did take plenty of time. Lock up is TIGHT. I ran 115, 124, 147 and hand loads and had zero issues while running a 14# recoil spring. So, shots 11-15 out of the barrel from a sand bag with moderate concentration yielded a sub 2" group at 25 yards....for what that's worth.