Been lots of talk lately about these factors, seems the paper punchers (F-class, Palma and BR) worry about it more than the steel shooters, as I believe the former shoot in more unknown conditions with quicker changing conditions between targets, therefore making these factors (apparently) disappear in the quickly changing "background noise".
ANYWAY....
It is something that IS ALWAYS there (and no-one disagrees on this) and it IS additive (for those of us with right hand twist bbls and shoot in the northern hemisphere).
The big quarrel is HOW MUCH, but I really don't care (loosely). If I can compensate (fairly closely) for it without having to think about it......what would be the disadvantages??
I can think of only a couple I'll bring up later.
So, here's what I did.....
I hung a 1/4" yellow rope from a tree limb at my range at 100 yards so I have a true vertical line.
I have a USO level on my gun (I don't see any way to do this properly without a level gun).
I canted the top of my scope to the left about .2 mil in 10 mils. (This is loosely what I have estimated my .308 178 gr @ 2730 fps @ 1000 yards has with drift and coriolis added)
I have a TMR reticule that the thin stadia lines subtend 10 mils (between the heavy top and bottom stadia lines), the heavy lines are .4 mils wide, so I put the bottom of the vertical thin line directly on the rope and canted the scope until the rope intersected the right side of the top heavy line, so I gained .2 mils in 10 mils. Rezero.
Took longer to explain it than do it. Very easy to see and to check.
If you disagree with the amount, just add more or less cant.
Now help me with the disadvantages......
1. Now you are slightly changing elevation as you adjust windage, is it enough to worry about? I never dial wind, so no downside to me.
2. If you don't have time to bubble level the gun, you may "eyeball" in a very slight cant. If it's a long range shot (say over 600 yards) I've usually got time to use the bubble level.
2 questions.....
1. Anything wrong with my method of adjusting the .2 mil in 10 mil cant?
2. What am I missing?
HB
ANYWAY....
It is something that IS ALWAYS there (and no-one disagrees on this) and it IS additive (for those of us with right hand twist bbls and shoot in the northern hemisphere).
The big quarrel is HOW MUCH, but I really don't care (loosely). If I can compensate (fairly closely) for it without having to think about it......what would be the disadvantages??
I can think of only a couple I'll bring up later.
So, here's what I did.....
I hung a 1/4" yellow rope from a tree limb at my range at 100 yards so I have a true vertical line.
I have a USO level on my gun (I don't see any way to do this properly without a level gun).
I canted the top of my scope to the left about .2 mil in 10 mils. (This is loosely what I have estimated my .308 178 gr @ 2730 fps @ 1000 yards has with drift and coriolis added)
I have a TMR reticule that the thin stadia lines subtend 10 mils (between the heavy top and bottom stadia lines), the heavy lines are .4 mils wide, so I put the bottom of the vertical thin line directly on the rope and canted the scope until the rope intersected the right side of the top heavy line, so I gained .2 mils in 10 mils. Rezero.
Took longer to explain it than do it. Very easy to see and to check.
If you disagree with the amount, just add more or less cant.
Now help me with the disadvantages......
1. Now you are slightly changing elevation as you adjust windage, is it enough to worry about? I never dial wind, so no downside to me.
2. If you don't have time to bubble level the gun, you may "eyeball" in a very slight cant. If it's a long range shot (say over 600 yards) I've usually got time to use the bubble level.
2 questions.....
1. Anything wrong with my method of adjusting the .2 mil in 10 mil cant?
2. What am I missing?
HB