Timspawn,
To help me understand the issue, I hope to some day see it first hand.
If it is not a stature or some other physical situation it comes down to one of two causes.
The stance of the person using the firearm or a scope that not well designed.
As said, I really like to see the situation first hand as I have just owned to many firearms and handled to many other firearms for too many years and all without such issues to be able to fully understand what is happening.
I've had some scopes which were less then good, but they were soon replaced with those of proven usefulness.
I currently own and use a RUGER #1 "S" which is the same size as the 1A, differing only in caliber as it is a 45/70. I have had two different 2X7 Leupolds mounted on the rifle, both of which have worked fine.
On past #1s I have mounted a number of other Leupold scopes (6X, 3X9, 2X7 and 3.5X10), at least one Weaver 10X, a Lyman 10X and a Leupold 10X and none of those gave any such issues, so you might see how I am having problems fully understanding.
Crusty Deary Ol'Coot