Re: detachable mounts for bolt guns
If you use a high quality rail and high quality rings to fit the rail ,such as nightforce,you can use one scope on multiple guns easily.
I like the nightforce unimount. It has 20 minutes built in so if you put a rail on each of the guns you want to use the scope on,and square the scope to the unimount,you can then switch guns in a minute or two.The scope will be square to the gun and if you keep notes ,just turn to the correct setting, zero the turrets , test fire and you are ready.
The mounts may cost a bit more,but if it saves you the cost of more scopes it is cost effective.If using a lower end scope you may not be able to rely on the repeatability of the turrets,so you might need to boresight and the shoot the gun to sight in. The nightforce scopes I have used are reliable enough that you can just keep notes on how many minutes up from bottom and how many minutes left of extreme right,and you will be very close to perfectly sighted in after switching to a different gun once you have the information recorded for each gun.