The Burris Fastfire III mini-holographic sight that is slide-mounted on my 10mm Glock G20 semi-auto pistol is working out great! Pretty easy to sight in, is holding up to the slide “recoil” well, and is a definite accuracy aide. Yesterday I shot it again – from a rest at 25 yards the first shot went center of bullseye. Walking up to around 15 yards and firing offhand made a second hole in the paper touching the first. Only fired 6 rounds – of Remington FMJ ammo – and all of the following shots at 25 yards were unfortunately not as good – probably due to my abilities more than the pistol or the sight, but all were within the “9” ring, and all would have been good shots in the vital area of a hog. A final check shot at a flower pot at 50 yards also went dead center with a direct hold. I think this one is ready to hunt, and should shoot to point of aim from zero to 50 yards, but I do need to check it at 75 and 100 yards, just for grins.
Not as smooth with the .460 Rowland 1911 and the C-More STS sight, though. Shots were considerably higher than point of aim, and the sight felt it had loosened somewhat under the recoil from the Rowland cartridge. While “milder” than a .44 magnum revolver, the Rowland 1911 does come back at you with authority! It was especially noticeable after shooting the 10mm. I plan to take my .44 magnum Ruger Super Blackhawk next trip and compare recoil with it. After I got home I took the sight off the slide mount and re-bedded it, put new Lock-Tite (blue) on the screws, hoping it stays secure – if not, will resume searching for red Lock-Tite! I do not feel that the sight itself has suffered any from the recoil, seems to be up to the task.
The recoil from the Rowland is much more noticeable to me when shooting off a rest. Offhand, it is less apparent. Mainly I feel I just need to shoot it a lot more (tough work, but somebody has to do it!). Will also be ordering some new Starline brass for it, as my fired cases show a “dent” – probably from the extractor – that will keep me from using them for anything but reduced power loads.
On this subject, none of the brass fired from the 10mm exhibited the infamous “Glock Smiles” that are especially common with high pressure loads in the unsupported Glock barrels. I am using the Glock 6″ “Hunter” barrel, and think the 24# recoil spring and stainless recoil rod I went to are helping to keep it in battery. I will still probably not load max or near max loads for the 10mm except in new brass.