Oldtrader3
Ammo Smith
- Nov 6, 2009
- 8,406
- 5
I think that if one does the 20 MOA square tracking test, that would tell you all that you need to know about scope and barrel alignment?
Mounting scope in line with bore?
- Thread starter andrewctillman
- Start date
Oldtrader3":1ilohebv said:
Charlie , I think what you're calling the square tracking test , is what I call a box test . it will show how well the scope can be adjusted , in all directions , and return to zero . this test will show the scope moving out of sync with the turrets . this will prove how accurate your scope moves in relationship to the amount of clicks ( adjustment ) you've made.
I'd say that yes it will show scope alignment . now that I think about it , these two tests could be done at the same time . if the first spot is shot at say the lower left (the aiming point ) , then the second shot made with only an elevation adjustment of lets say 20 moa . that second shot should hit exactly straight above the first shot by 20 moa . so if the target already had a true plumb line ,the first shot would be on the lower end of this plumb line ( the aiming point ) , and the second shot should hit on that same plumb line only 20 moa above shot number one . I've never done these tests at the same time , I never thought of it .
here is one of my scope alignment targets . my first shot is under the masking tape . my third shot is the one showing . this is my aiming point .
this is the upper of the same target . my second shot was off , looks to be about 3/4 inch . I rotated the scope a little . then made the third shot that is on the above target .330" off the line ( masking tape ) . then I dialed my elevation up . my forth shot was .380 off the line . so I said good enough , .050 could have been me , or anything . I then moved the scope one click left for a good sight in .
Oldtrader3
Ammo Smith
- Nov 6, 2009
- 8,406
- 5
Yup, it will at least give you an indication of degrees and/or minutes off plumb. So, you have the option of rotating the scope or averaging the shift?
I like to rotate the scope to get as close as I can . I don't want to be adding X amount of windage for every so much of elevation change . I remember years ago I had a rifle that when I sighted it in I'd have to add a few clicks windage for every so many clicks elevation . I just thought that's the way the scope was . since learning of this scope alignment I'd say the scope needed rotated a little .
Oldtrader3
Ammo Smith
- Nov 6, 2009
- 8,406
- 5
Yeah, Jim, that is what it needs. Just rotate the scope a few minutes of angle and you should be GTG.
longrangehunter
Handloader
- Jun 19, 2011
- 1,476
- 6
jimbires":1602b0p9 said:
This is the same technique I outlined above and use with all my LR rifles. If anyone doubts its importance to long range accuracy look up Darrell Holland and what he does for a living.
