Hello. I've read on this forum many times but first time to post. I just bought a model 10 fcp-sr the new one. Sat a vortex pst 6-24x50 on it. I'm having a problem I've never seen before keep in mind I'm new here but not new to shooting . This vortex suppose to have 65 total elevation it actually has 70 moa. I put a weaver 20 moa rail on and sighted in. After sight in I checked remaining elevation and only had 30 up elevation left after zeroing of coarse. I was hoping to have around 45. I've never heard of this before especially using a 20 moa rail. The rifle will shoot and group great sub half moa. I've swapped rail for another weaver 20 moa and also unmounted every thing and remounted twice. OK. I know I can go with 30 or 40 moa rail even adjustable rings but I would like to hear thoughts on this problem first. Oh I have Burris xtr tactical low mounts. Any ideas or thoughts.