If you get a laser sighter and you have another rifle that is already sighted-in that has the same scope height in relation to bore, chuck it in that one to see where it points in relation to bore when that rifle is clamped in a vise. Put the in the new rifle/scope combo and adjust the scope to point to the same spot as the one that's sighted-in. That should at least get you on paper, even though barrel vibrations may cause bullet impact points to vary.
I also like to pull the bolt out of a rifle and bore-sight with the rifle clamped in a vise. It tends to be more accurate than laser bore sighters.
I also have a Sweeney Sight-Align Vise that I bring to the range when sighting-in several rifles. Just fire one or more shots on paper, clamp the rifle in the Sight-Align, adjust the vise to make the crosshairs on the center of the target, then adjust the scope to be where you want the crosshairs in relation to bullet strikes at that distance. Fire a shot or two to double-check the setting.
I used the Sight-Align vise when running my gun repair business and sometimes sighting in a half-dozen rifles in one sitting. It saved a lot of ammo...and my shoulder.
I also like to pull the bolt out of a rifle and bore-sight with the rifle clamped in a vise. It tends to be more accurate than laser bore sighters.
I also have a Sweeney Sight-Align Vise that I bring to the range when sighting-in several rifles. Just fire one or more shots on paper, clamp the rifle in the Sight-Align, adjust the vise to make the crosshairs on the center of the target, then adjust the scope to be where you want the crosshairs in relation to bullet strikes at that distance. Fire a shot or two to double-check the setting.
I used the Sight-Align vise when running my gun repair business and sometimes sighting in a half-dozen rifles in one sitting. It saved a lot of ammo...and my shoulder.