45-70 Seating depth

[jgh4445]

Does anyone shoot a 45-70 sharps ( or I guess any single shot) with the bullet seated in such a manner that the driving band and one grease groove are outside the case and the bullet firmly into the rifling? When I used a comparator, it showed that I am about .314 inches off of the rifling with the ogive. The postel bullets nose is in the rifling but not touching, the round nose govt bullet not so much. Just wondering what the effect might be if I loaded with the bullets seated further out. Also wondering if that would create a pressure problem. Black powder of course.