Rifle Scopes Scope height over bore
- Thread starter Doc68
- Start date
measuring tape, center of scope tube (normally where the rings split) to center of bolt.
Great idea, been wondering about this myself. Never thought about something so simple.
On my rifle, the center of the bore happens to line up with the flat of the ejection port. So I just take a caliper and measure from the split in the scope mounting ring (which is scope center) to the flat on my ejection port.
I use a small T-Square, but any of the things mentoned will work. The difference between 2" and 2.25" on my rifle equal .06 mil at 1000 yards. So get as close as you can, but don't lose sleep over it.
If you want to satisfy your OCD, it's pretty frikin' easy....take your calipers measure from bottom of scope tube to top of bolt body. Take that measurement and add to it, half the diameter of the scope tube and half the diameter of the bolt body...bingo OCD happy!
What if the scope in in a 30 MOA mount? Do you measure from the middle, the occular, or the objective?
I use half the actual scope tube diameter. Why would you use the Ocular end or Obj.?
Where do you measure from? I don't run 30MOA base only 20. Doubt it matters at all.
What if the end of your barrel was clocked high at 12'O clock and had .035" runout compared to your breech end?
Just another method to get the same results.
Where do you measure from? I don't run 30MOA base only 20. Doubt it matters at all.
What if the end of your barrel was clocked high at 12'O clock and had .035" runout compared to your breech end?
Just another method to get the same results.
Where on your scope do you measure from?
I get notably different numbers from the back end of the scope close to the ocular
Compared to the front of the scope just behind the bell (objective)
I get the adding the 1/2 of objective +1/2 of bolt plus distance...
But at what location do you measure the distance?
I get notably different numbers from the back end of the scope close to the ocular
Compared to the front of the scope just behind the bell (objective)
I get the adding the 1/2 of objective +1/2 of bolt plus distance...
But at what location do you measure the distance?
I reckon you could measure the scope and barrel diameters and divide them in half, then add the distance between the two. Takes about 30 seconds with some calipers.
Refer to post #8......Compare numbers in a ballistic calculator and you will see it's a microscopic insignificance even at the mystical one-thousand yards.
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