About a year ago I put a new Aimpoint 9000 on my 7.5" 475 using Freedom's base and two Aimpoint wide rings. I shot it that way for a couple of months and then took it off and went back to the iron sights because I just didn't like how bulky the gun was with the sight. About two weeks ago I wanted to see if I'd like an Aimpoint on my slug gun so I put it on my slug gun. I went to the range and the first shot was low right about 10" @ 50yds. So I put in the appropriate # of clicks and no change. I put a few more clicks in and it moved alittle. I was concerned because the click adjustments no longer felt solid. The elevation clicks were barely there and would barely catch. To make a long story short; over the next 15rds the scope did not track with the adjustment. Just when I thought it was there the next shot would be at the edge of the paper. I went home pulled the Aimpoint off and put a regular scope on and had the gun zeroed in 3 shots. I fired some more shots just to be sure and got a nice group of 5/8" holes touching or nearly touching each other so it's not the gun or ammo. The gun is a Rem 870 with Hasting fully rifled cantelever scope mount slug barrel shooting Lightfield hybrid slugs. I thought Aimpoints were supposed to be tough? Maybe there're only OK on guns with .223 level recoil? It's not like it endured thousands of rounds of 475 either. Less than 500 rounds. I will contact Aimpoint and hopefully they will fix it, especially considering what these units cost.