As to your 15" Encore 7mm-08 - I wish I could get mine to group like that. I've only had it out once but I suspect my problem is in the scope or the mount rather than the gun itself.
I really believe that the "secret" is in Lee collet neck dies and Redding body dies. I'm no reloading guru and other than an RCBS Chargemaster, I don't use any expensive equipment or special techniques, yet I have no trouble getting any rifle I've yet tried to shoot an inch or under, usually well under. With no real effort either, beyond working up to max load.
Still happily answering to the call-sign Peetza.
You do not HAVE a soul. You ARE a soul. You HAVE a body.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.