With good mounts, using a torque wrench, and putting it back into the same slot each time, you can USUALLY expect return to zero. But there are a ton of reasons why this is a pain in the dick. The scope must have one rifle which is the 'master' and the others are a recorded number of clicks off from that. Have fun, and hope you take excellent notes, and hope you don't have a brain fart and forget how the erectors move, and understand exactly how to manipulate the zerostop in a way it isn't really designed to be used, and THEN you get to rewrite/memorize all your adjustments every time you need to change zero on the master rifle. Fun stuff. It also eats up a lot of time on the range dicking around at the range and presents plenty of opportunity for thousands of dollars of optics and rifles to go tumbling to the concrete as you try and play gunsmith at the firing line.
Oh yeah, each time you do it you arent 100% sure you kept zero. So you have to confirm. And if you didn't, and have to fix fix that, guess who gets to go theough the above process again?
Can you tell I'm a fan?