I've got a Glock 20 and a Blackhawk 10mm/.40 on order but I've not taken anything with the 10mm. I've had a G40MOS in the past, nice gun but sadly I've not got the chance to go hunting in the past few years.
I have the old Deltapoint on a Kimber 1911 set up for .45 super. It wouldn't hold zero and had to go to the factory. Since it was repaired, it has worked perfectly for about 2 years. I have the newer model Deltapoint Pro on a 6" 1911 10mm that has been perfect. I really like the improvements Leupold made on the Pro. However, I just mounted another DPP on a FA .454 and after 25 rounds the automatic on with movement feature is not working. It's about to go back to Leupold for repair.