question on rifle bore

[Deerstalker]

This may be a dumb question but trying to determine if on a HW95L .22 the bottom of the safety would be a good point to measure to the scope centerline for scope height above rifle bore. This would be used in Chairgun, or other APPS, for the calculations. Pic for reference of my rifle. I get 1.5" from bottom of safety to center of ring caps, white mark in pic.

 

[beerthief]

The picture does not include the barrel , so no way to tell answer your question .
Their are no dumb questions . sometimes you get dumb answers to the question

You could draw a straight line the length of the rifle . line up the gun and center that line in the center the scope now measure down from that line at the muzzle end of the gun to the center of the bore .

 

[JohnTaylor]

This may be a dumb question but trying to determine if on a HW95L .22 the bottom of the safety would be a good point to measure to the scope centerline for scope height above rifle bore. This would be used in Chairgun, or other APPS, for the calculations. Pic for reference of my rifle. I get 1.5" from bottom of safety to center of ring caps, white mark in pic.

It’s likely the compression tube is centered on the wood vertically. Perhaps a small square and a rule…measure to the bottom or top of scope and add or subtract half the diameter.. John

 

[Airgun-hobbyist]

Here's an easy way to get real close with that gun, if you have a set of dial calipers or similar measuring device. It requires three measurements and some math. First, measure the outside diameter of that scope's front bell, then measure the diameter of that barrel housing right by the break, and measure the air gap distance between the bell and the spring/piston housing. For the math, add the scope and barrel diameter measurements together and then divide that number in half, then add the air gap number to it. This will get you very close to the centerline.

 

[Deerstalker]

Here's an easy way to get real close with that gun, if you have a set of dial calipers or similar measuring device. It requires three measurements and some math. First, measure the outside diameter of that scope's front bell, then measure the diameter of that barrel housing right by the break, and measure the air gap distance between the bell and the spring/piston housing. For the math, add the scope and barrel diameter measurements together and then divide that number in half, then add the air gap number to it. This will get you very close to the centerline.

View attachment 521127

My SWAG math gives me 1.44" scope height, 51mm scope diameter, 16mm barrel and 3.1mm gap. 25.5mm objective/half + 8mm barrel/half + 3.1mm gap = 36.6mm = 1.44" scope height. Tks.