Personally I have went to Talley 20 moa anti-cant Picatinny rails on our longer range rifles, basically a spirit level built into the rear of the rail. I swear by them no more looking around the scope to see the tube mounted scope level, at least on the Weatherby version the bulb level is super glued right into the rear of base itself inline with the rail above where the rear base screw is which is not a big deal if you never remove the base, no more level snagging, I called Talley and he said if you ever had to remove the base just break the bulb level and call him and he would sent a new level. you could always go with the non-level picatinny rail from Talley (but why) if you take a look at Talley pictures of the anti-cant rail you will see the screw placement. I would absolutely go with a 20 MOA on any longer range caliber just in case you ever wanted to put a really long range scope on the rifle. I'm kind of a cheap basta at heart on a lot of things I use Weaver Tactical rings and they work fine. the good side with a Picatinny rail is you can adjust the scope fore and aft in a lot more positions to get your eye relief as close as possible to ideal, another thing with Picatinny rails you can set up different scopes for one rifle and still be pretty close on your zero's, of course you can do the same using Weaver type or other Picatinny bases, using thumb screw, quick disconnect, or tactical rings, lots of ways of doing it.