I recently got a Marlin 795 SS .22 and took it out shooting today to test it out. All is working really well except that the rings don't hold onto the 3/8 groove that well and after 20 or so shots is moves down quite quickly and starts to slide right off the groove. I don't know what brand the rings are, I got them at the gun shop and they had no name on them, I just asked for rings and was handed these. Is there a brand that works really well for a .22 on a 3/8 groove that no one has had problems with? I have these so tight there about to break so that's not the issue. Any info would be great, thanks.