I took the plunge and bought a silent but deadly string for my pronghorn,, I have always had a nocking point 3/8ths of an inch above center, Well I put on the new string let it sit for a few days and today I decided to put on a nocking point. I tied one on and took a few shots to look at the arrow and see how they flew, I could see some up, and down wobble, so I paper tested it and whoa it did show nock low, I started moving the point up till I got the paper tears I liked and wow it was 7/8th of an inch high of center, most I have ever had. I think the new high performance SBD string had something to do with it, and I'm wondering if anybody else has had similar results,