A pair of pointed-end cylinders don't prove much, unless you also lay a straight-edge along both cylinders IF the points align. Otherwise it's like touching the tips of two ball-point pens. That doesn't mean they're aligned.
If the rear ends of both cylinders are flat, turn them around and see if those ends match up. If they do, with no gaps, then the rings are straight.
If there are problems, one way to deal with it is lapping--but the fault isn't usually in Talley rings. Instead it's probably in the surface of the action, which isn't even, due to polishing or other problems. It actually works better to "bed" the bases on top of the action, using a straight 1" bar through both rings, using typical action-bedding epoxy. There are various ways to do this, but one of the best is with an Echols scope bar, which has slots so the bases can be screwed down while the rings are on the bar. Talley also can machine the undersides of their bases so the rings are straight.
If you lap the rings to "straighten" the insides, they'll probably be useless for putting on another rifle.
Mule Deer,
Saw a youtube video of a guy using JB Weld to bed the rear section of a one-piece base. Looks like only a small amout was needed. Do you see any issues with using the JB Weld?
GB
