Scope on a PTR-91 SC

-Hi,
 
      I have been looking to hook my PTR SC with a scope latley and have been looking at the Leupold VX-7 2.5-10X45mm and the Leupold Mark 4 LR/T 3.5-10X40mm i was just wondering what your thoughts are on these scopes? Which would you prefer?
I'm a predator hunter (mainly coyotes) and was wondering how these scopes would perform with the 7.62X54 (.308 winchester) rounds do you think these scopes are in the right power range for this rifle and application? or should i go for higher power like the Leupold VX-7 3.5-14X50 or the Leupold Mark 4 LR/T 4.5-14X40. I'm open to any suggestions or thoughts you might have. im also looking to use the Leupold Mark 4 Tactical Rings dose any one have any experience with these rings? I'm thinking i will need either the high or super high mounts. I know lower is better and was wondering if any one has used these rings with there PTR and could set me stright on the matter.
 
                                                    Thanks for your time
                                                                 -Rex Renolds

< =AttachmentDownload id=download marginWidth=0 Spacing=0 marginHeight=0 Border=0 scrolling=no>