What size super uni bushing will fit a Gold Tip XT shaft?

Thanks

You don't use a bushing. The nock should press right in. The only bushing I've seen used in most common sized carbon shafts is the ACC-60 bushings when planning on using G-nocks, which isn't a bad move anyway.

If you are going with g-nocks, i would use gold tips g-nock bushings.
They fit more snug, and are better on tolerance on gold tip shafts.

I know that the standard nocks press in but for 3-d I wanted to try using the bushing so that when arrows nock into each other in the target, it will not damage the end of the arrow. I lost a lot of arrows last year with splintered ends. I figured that the bushing might protect the shaft better.

Bushings prtect the end of the shaft? You are correct in your assessment.