If you are shooting 3 under and the bow was tillered for split fingers, that might be the reason you need such a high nocking point.
I recently switched to 3 under from split fingers. I found that to get good bare shaft flight, my nock had to be set at least 1/8" higher than it was for split fingers, for my bows that were tillered for split fingers. For example, if my nock point was 1/2" for split fingers, which is usually the case, it would have to be 5/8" - 3/4" for 3 under.
I have one longbow with a nocking point just above 5/8" for split fingers, that I fooled with all one afternoon to try to get it tuned for 3 under. I ended up with a nock point of 1"+ (the bow square ran out of marks at that point). The bare shafts from that bow fly squirrelly, sometimes high, sometimes low, which leads me to think that that bow really can't be successfully adjusted to shoot 3 under.
I think 3 under gets a reputation for wobbles in the arrow flight because people are shooting with too low of a nock point and the arrow is deflecting off the shelf. When I re-tuned a bow that was originally tuned for split fingers, I would initially get a false nock high with the bare shaft caused by the bare shaft recoiling off the shelf. As I raised the nock, the nock high would go away and I would often get a nock low at about 5/8", followed by a slight nock high which I like between 5/8" and 3/4". For my bows that I have successfully retuned for 3 under, the arrow flight is as good as it was with split fingers.
I think as long as your bare shaft arrow flight is good, and the angle it is hitting the target is the same or slightly higher than fletched arrows, you should be fine.
If you're shooting split fingers, 1" does seem quite high, though.