Broz
Well-Known Member
Interesting Bill, Thanks!
Jef
Jef
So in my opinion, leveling the action and the scope reticle to each other will minimize the error when elevation changes are necessary.
J E CUSTOM
The reason for leveling the action first and then leveling the scope reticle is because the barrel center line and the scope center line are not parallel, they form a triangle and converge at some
point. If the reticle is not level with the action, as elevation is added horizontal POI will shift
left or right depending on the error in level and distance.
I know match shooters that cant there rifles naturally and when they increase distance they add Windage to compensate for the change.
If everything is level there will be almost no Windage change when going from one distance to another other than that caused by the wind.
One way to test the reticle is to set up at 200 yards and after zeroing start cranking in elevation
(4 MOA between shots) aiming at the same point the vertical string will start to move off the vertical line if the scope and scope are not level with each other.
So in my opinion, leveling the action and the scope reticle to each other will minimize the error when elevation changes are necessary.
J E CUSTOM
When I posed this same question to Norm Houle. his point was that mathematically you are correct. However, under real shooting conditions, it's not a factor because of all of the other things that affect the bullet. Personally, I am much steadier with a canted stock and I feel that this makes up for the slight horizontal error introduced by canting my stock. It's not for everyone but it's worth a try.
Not exactly. This would be true if you're reticle is canted when shooting but not if the gun is canted and the reticle stays plumb. Having everything perfectly plumb and aligned is ideal, but canting the rifle for a more comfortable fit will only introduce a small amount of error, especially if you're zeroing at 200 or 300 yards. That 1/4" misalignment will equate to 2-1/4" at 1000 yards if you zero at 100 but will only throw you off 1" if you zero at 200. The most crucial alignment, as has been stated a few times already, is making the reticle plumb when you shoot. If your reticle is plumb when your scope level says it is you are good to go. I level my guns the best I can and then use a plumb bob to make sure the reticle is plumb. A piece of rope with a weight attached works great and can be easily seen from across the yard.bil123, JE Custom is spot on and has explained it very well.
The 1/4 moa error at 1000 yds you talk of would only be the case if using something dead flat like a laser. But as you dial in elevation the error grows. The more you dial in the greater the error.
Not exactly. This would be true if you're reticle is canted when shooting but not if the gun is canted and the reticle stays plumb. Having everything perfectly plumb and aligned is ideal, but canting the rifle for a more comfortable fit will only introduce a small amount of error, especially if you're zeroing at 200 or 300 yards. That 1/4" misalignment will equate to 2-1/4" at 1000 yards if you zero at 100 but will only throw you off 1" if you zero at 200. The most crucial alignment, as has been stated a few times already, is making the reticle plumb when you shoot. If your reticle is plumb when your scope level says it is you are good to go. I level my guns the best I can and then use a plumb bob to make sure the reticle is plumb. A piece of rope with a weight attached works great and can be easily seen from across the yard.
...will only introduce a small amount of error, especially if you're zeroing at 200 or 300 yards. That 1/4" misalignment will equate to 2-1/4" at 1000 yards if you zero at 100 but will only throw you off 1" if you zero at 200. The most crucial alignment, as has been stated a few times already, is making the reticle plumb when you shoot.
I couldn't agree more. Aside from wind and range estimation, there are four ballistic errors that can creep into long range shots:I guess I am still confused as to why you would not want to eliminate as much error as possible...