![]() We've already been through this and know the answer. No, you do the trig and a provide a full explanation with drawings trying to prove your point. You'd need the barrel to be offset under the scope by over half an inch to match the same error. In terms of the effect, at 1000 yards just 1 degree of cant can create a 6 inch drift of the bullet impact. That's why scope cant matters so much and the system is so sensitive to it, you are moving two points that are quite a distance apart from each other at the target plane. You've sent the bullet on an arc that doesn't match up with gravity and what the bullet is actually going to do. If those two points on target no longer align vertically with each other what you've done is create a cant in your ballistic solution. at 1000 yards those two points might be 30 feet apart from each other on target. the 100 yard zero starting point and then the new dialed elevation for distance. Now when you cant the scope what happens is you are moving two points relative to each other. There's no canting of the ballistics happening, just a left/right offset. It's a linear problem - no trig involved because the scope is level to gravity, the erector travel you dialed for a come up is level to gravity, and the arc of the bullet is level to gravity. At 200 yards the left/right error will be exactly the amount of horizontal offset from bore to scope, then for every extra 100 yards you shoot it adds another equal amount of offset. Gun gets zeroed at 100 yards, but that left/right error reappears when you shoot farther than 100 yards. Barrel no longer sits underneath the scope. If you cant the rifle under the scope, but then re-level the scope, all you've done is create a horizontal offset. Math often skips the logic underlying the issue. I hate the math debates on stuff like this. Rifle cant underneath is a non-issue in comparison. If you're holding over level scope means a level reticle. If you're dialing for elevation level scope means the erector travel path. ![]() the only leveling error that really matters is when you pull the trigger the scope should be level to gravity. With my Manners stock I just cant the stock a few degrees so the buttpad fits my shoulder nicely and so that the scope bubble level is level when I get behind the rifle in a natural position. I adjust buttpad cant on the chassis to make it comfortable. With my MPA chassis I'll align the scope so that the scope bubble level and the bubble level on the chassis match. With the rifle still on the tripod mount, run the scope through the elevation travel range to see if the reticle tracks true with the plumb line. Hang a plumb line and align reticle to plumb line,Ĭlamp the bubble level on the scope tube. Put rifle onto heavy duty tripod with hard plate chassis mount.
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