You're going to be fighting zero's every time you swap it. A 1 pc mount is certainly easier and faster to swap, and it'll return to zero within reason after being removed and remounted (1moa is doable with a good mount). A lot of the time it'll be closer after firing the first shot (at least my ADM was).
Each time you swap it to a different rifle you're going to have to re-zero it though. Then re-zero it when you put it back on the original rifle...
It'll do for a short time, but save your pennies and get an optic for each rifle and you'll be a lot happier. A rifle without an optic (or some kind of sight) is about as useful as a pistol at distance, and a baseball bat up close...