On target

I have a couple of different bore-site tools - both laser and refractory types. I tend to use them on firearms when first trying to get on paper at 100 yards. But, I find them not so useful on air guns for two reasons: 1) not starting so far away. Usually, I start at 10-15 yards and they're always on the paper at that distance. Then moving out to 25, etc. making adjustments as I go. 2) the refraction type uses a magnet to hold onto the muzzle and airguns usually have shrouds, end caps, etc., that are of a non-magnetic material. Even if they are removed, the barrel is so small that it has a hard time holding on.

Hello Mondo,
Many thanks for your response.
Feyachi Bore Sighter Kit.
From the limited information given on Amazon this kit is different from a muzzle bore attached laser, instead of
a laser it has a grid display mounted on a round wing casing. The scope reticule view is then overlaid on the grid
which guides the scope or RDS adjustment for a ball park zeroing.
Details missing.
The muzzle bore attachment seems to be a metal rod with spring holding clip. Would have thought there is a chance
of scoring the inner rifle bore surface especially if choked?
The round wing casing has no vertical adjustment from the mounting bore axial rod from what I can see. What about
the different mounting heights of the optical sight being set up? The sighting could go off grid?
Would welcome any comments.