Pump gun one shot sight ins?

[alleyyooper]

Is there a way to sight in a pump slug gun like a bolt action with one shot?
With the bolt action you shoot a shot, remove the bolt line the bore up with the hole and adjust the scope to get the cross hairs on the hole. Usally real close when done.

   Al

[Dee]

Well, I would say that if you know the adjustment increments on your scope it would be little different than sighting in a rifle with a bolt. I have never seen the need to look down the bore of a rifle except to make sure it was clear.
After the first shot, just count the inches and adjust the scope accordingly.

[eye shot]

They make bore sighters for shotguns.

[spikehorn]

Put the cross hairs back on the original spot when you pulled the trigger and then adjust the scope to the point of impact