Do you happen to use a base with built in MOA compensation? Otherwise I would think that the center of the ocular lens would be at the same point as the center of the scope tube, which should also be the center of the objective lens. On a well built rifle that doesn't have any MOA compensation in the rings or bases, the the long axis of the scope should be parallel to the bore and I would think you should come up with the same measurement. Please correct me if I'm wrong.
Is velocity really my issue? Or something else?
- Thread starter cbh560
- Start date
Do you happen to use a base with built in MOA compensation? Otherwise I would think that the center of the ocular lens would be at the same point as the center of the scope tube, which should also be the center of the objective lens. On a well built rifle that doesn't have any MOA compensation in the rings or bases, the the long axis of the scope should be parallel to the bore and I would think you should come up with the same measurement. Please correct me if I'm wrong.
Terry Perkins
CGN frequent flyer
- Location
- Bruce County
I use a 20moa base. If I'm off base (LOL) let me know.
A 20 moa base is slightly shorter on the front end, lowering your objective lens relative to the bore which gives you your additional 20 moa of elevation adjustment. The axis of your scope would no longer be parallel to the bore, so a measurement to center of the ocular lens would be higher than the center of the objective.
I have never had a load where the calculated drop values perfectly match the actual measured drop but maybe Korth/leupold use more sophisticated software than I do.
Haha thanks. I wish I could but thinking costs me nothing and shooting costs a fair bit these days so I bring down the cost by thinking more and shooting (hopefully) better quality.
If its just about getting a CDS dial engraved; give Korth the velocity number that works. There's nothing magic about their math and whether the error was in the velocity or the adjustments is beside the point.
A field expedient for a dial that hits a click or two low at 500 is to sight in a click or two high. A click doesn't mean anything at 200.
Velocity accuracy is suspect, clicks may not or be exact, targets move due to mirage, air changes in density, BCs change with velocity and sometimes marketing. Targets are consistently heartless #####es that tend to win their arguments.
Shooting is expensive but its cheaper than a shrink.
A field expedient for a dial that hits a click or two low at 500 is to sight in a click or two high. A click doesn't mean anything at 200.
Velocity accuracy is suspect, clicks may not or be exact, targets move due to mirage, air changes in density, BCs change with velocity and sometimes marketing. Targets are consistently heartless #####es that tend to win their arguments.
Shooting is expensive but its cheaper than a shrink.
