A new finding in achieving accuracy.

[theLBC]

it seems to me that it would have occurred to everyone that uses a bipod what that cant adjustment was for, but as long as you know.

everyone is right when it comes to this. it can be important, but not for everyone at all ranges and every use case.

not everyone's natural position has the rail perfectly level, and ultimately it is consistency and repeatability that counts counts for most of us. if your poi shifts left or right when you dial or hold over, you might need to look at this.

i personally find myself more off level when shooting off a tripod (using a sendit level).

 

[Archdesigner03]

I find the cant issue is more of a problem on my bullpup since the scope is mounted higher with 3 inches from the center of the barrel to the center of the scope. I don't know the angle I was shooting at prior to mounting of the svope bubble but it's about 1 inch difference from POA to POI only at 40 yards.

 

[nervoustrig]

I find the cant issue is more of a problem on my bullpup since the scope is mounted higher with 3 inches from the center of the barrel to the center of the scope.

If you are using mildots for aiming or dialing the turrets, the scope's height does not affect cant error.

It is a common misconception, and one I used to believe until I did an experiment similar to this one
http://www.szottesfold.co.uk/2012/03/high-scope-and-canting-end-of-ancient.html

 

[Ghostranger169]

These different scenarios give you a diagnostic tool to analyze POI results which differ from expectation.

Some setups may exhibit larger differences than others. If you are not seeing any of these problem scenarios, then it isn't an issue to be concerned with. You can test the effect by canting your gun dramatically into a position in one of the scenarios and shooting at the 3 distances(closer than the scope zero distance, at the scope zero distance, and farther than the scope zero distance). Another thing to keep in mind is that in all these scenarios, the gun will be "on" at the distance the scope is zeroed to. 

 

[JimD]

This is one of those many shooting things where there are many strongly held opinions but no consensus. I find it easier to use wedges to level the scope to the scope rail and then I put a level on either the rail or the scope, I have guns both ways. This assumes the scope rail is machined properly. But sighting the bore and scope in a mirror is not ultra precise either. I am OK trusting the machinist. Others may prefer their eyes. That's OK with me. But I do not accept that doing things visually are always better. I guess I could check mine using a mirror but they shoot well and that is all that really matters to me.