I've got a model 700 I just finished putting togehter. Its chambered in 300WM. With scope and everything its going to weigh in around 18 lbs. I'm going with a 20 moa base. My question is with the 300WM would the Kelby 4 screw rings hold up or would I be better off to go with something like the Burris extreme tactical rings. The only worry I have with the Kelbys is the rings slipping on the bases during recoil. Thanks for any info.....................