I haven't worked with the 77 to much yet Don. Been concentrating on the .44-100 getting it ready for the Creedmoor. I know now that it shoots if I keep the C.O.P.D under control.
I did shoot the old Sharps bullet at Raton when I camped there last winter and it walked the iron critters with the barrel sights. It did a bang up job on the critters all the way to the Buff on the hill at 1200 yds using the barrel sights on the .44-77.
When I get done with the Buff hunt I will put some target sights on this rifle to see just what it will really do after the corn is picked

Might use it for a silhouette match at Cadillac Mich. in October.
As far as the vertical, I havent had a problem with the 2F KIK since the old stuff in the tin cans. That gave me a bunch of fitts. The reason I'm using the KIK right now is I have a bunch of rounds loaded with it and I been pulling the hard bullets and changing the to a soft 1/40 T/L for the hunt. It is saving time that I need right now doing other things like picking the fruit and grapes. The Peaches are so heavy this year that the limbs are snapping as are the Apricots and Apples. Carolyn is busy freezing the stuff and making Jam.