Just did a couple of Encore barrels and had the scopes zeroed in no time. We put up a plain piece of paper at 20-25 yards with a small dot in the middle for an aiming mark. Fire one shot. Then reposition the rifle securely in the rest - no movement if possible - and put the crosshairs back on the aiming mark. Get a buddy to carefully move the crosshairs over to the bullet hole - he should be very carefull not to move the rifle as he does that. Next shot will hit the point of aim.
Setup a target at 100 and you should hit it somewhere reasonably close. You can repeat the previous method or simply crank the crosshairs the appropriate clicks to move the bullet to the point of aim or to your desired point of impact (if you prefer to have the zero a little high at 100 yards).
Good luck, sounds like a nice rig.