Paper Tuning Individual arrows

[Sabre03]

I was paper tuning my bow today. I have 5 arrows. 2 would make a perfect bullet hole everytime. The other 3 would always tear like 1/2 inch to the right? I refletched them thinking that was it, but it didn't improve. I adjusted the rest and that didn't make a huge difference either. I know I'm splitting hairs here, since my bow is considered by many to be acceptably tuned. But I wanted to see if I could get it perfect. I beleive my arrows are right on the edge of being underspined. Could the 2 be a little stronger or something? They all weigh in at 366gr total weight.

MQ1 71-72lbs
Gold tip XT 5575 27 inches end of carbon to end of carbon
100 gr tip

i'm standing 6 ft from paper and using good form. I moved back to 8 ft with same results.
While tuning my QAD Ultra rest I ended up making the nocking point lower than the valley of the rest at full draw to get the arrow just right in regards to paper tuning nocking point. Is it normal to have the nocking point lower?
Any ideas what would cause the same 2 to be perfect everytime and the same 3 to be a little off?

[GVDocHoliday]

Try adjusting the nock on the arrow a bit. Twist it a 1/16" here and there and see if that improves.

[Sabre03]

i'll give it a try, I also noticed that if I try and pull the arrow from the string the nock pulls out. I just bought these nocks and they are a little tight, should I take a file to them a little bit.

[GVDocHoliday]

Never take a file to the nock. The nock needs to be in perfect out of the package condition. Nothing worse then having a nock break at the shot and having a dry fire. Seen it happen.

[Grouse Hunter]

i'll give it a try, I also noticed that if I try and pull the arrow from the string the nock pulls out. I just bought these nocks and they are a little tight, should I take a file to them a little bit.

You can hold them over a pan of boiling water with some forceps. they get softer and then just put a litle pressure on them to open them up a little.