Just bought a S&B PMII 5-25x56 with the MSR Reticle. Ordering a Gap 10 .308 with either an 18" or 20" barrel. Will be shooting occasionally out to 1000 yards with 175 grain FGMM. Whats the best way to mount this scope? I know that S&B Scopes come with the elevation adjustment set to over half the elevation range. Should I use a mount with a cant, if so how much? Rings?