12-06-2011, 09:34 PM
You can use a micrometer from the center of the bolt, locked open, to the bottom of the scope tube, then measure scope tube & add Half that diameter to get you pretty close. Really, I'm sure within 1/8" is probably close enough. You always have to verify ballistic calculations anyway so do the best you can do with your measurement, then check it in reality.
What I found tricky was with my inclined base mount. HMMMM, I decided from the front of the chamber to the center of the scope was the best I could do & I had to guess at where the front of the chamber is & where the middle of the bore is up & down at that point. I could certainly be wrong though. LOL.
What I found tricky was with my inclined base mount. HMMMM, I decided from the front of the chamber to the center of the scope was the best I could do & I had to guess at where the front of the chamber is & where the middle of the bore is up & down at that point. I could certainly be wrong though. LOL.