I agree. Over the years I have had people that I have tried to explain this to but to no avail most of the time. I really have a hard time relating this to people who want a laser to shoot with. I still have a few rifles that look, not straight when shouldered by an other person they say your scope is crooked , I stopped trying to explain it.
What I have done since the rotation was to place targets at 20,30,40 & 50 yards and verified the only obvious change in POI was in the vertical. My scope is a BSA Sweet 22 with a very repeatable elevation adjustment and accurate range finding with the AO. A piece of double sided tape and a strip of index card around the circumference of the elevation ring allows me to make my own scale for these ranges. I'm aware of the bell curves in velocity on my PCP since after cleaning and charging the first tank was shot over the chrony. That's how I found the sweet spot and why the test was conducted below that pressure range. Regardless it was an interesting excercise.
Scotchmo, May I call you or email you direct to discuss your thoughts on "Can Errors" using Aperture Sights? Ken Douglass
What is meant by "scope rails in relation to the stock" is that i don't think the rifle body is not vertical or not centered in the stock or the dovetails are off center.
My problem is I have installed three perfectly new ring sets that have installed canted on a non-canted receiver. And I can't see any obvious defect in the dovetails.
I am probably over simplifying things but this is how I set up a scope when concerned about cant.I take a piece of number 12 awg copper wire with white insulation. I bend this wire into a 90 degree angle. I insert one end into the barrel and as I mount the scope I look through the scope and try to make sure that the vertical cross hair lines up over the vertical piece of wire. There are probably better ways of doing this but this will get you pretty close.