Had a HHA OL5510 put on my Pse today got it sighted in, then I decided I would shoot the rear of my bows just to play around. Shot my Arena 30 shot great, got Pse shooting great with NAP Killzone Max's, Arena 30 Shooting DRT's great. Grab the Nitrium, decided to switch from Red's to Nemesis, got it re-sighted in was about to in stall new tape on the dial, had 2 mechanicals to choose from, shot them both, both are hitting above my field points. I've never seen this with a mechanical. Do I just tune rest like a fixed blade to get the mechanicals down to my field points?
I would imagine it's the same as tuning for fixed heads,guess that's why they call it broad head tubing not fixed blade tuning. You could tune with a fixed head to make sure your bow is tuned right.
"switch from Red's to Nemesis, got it re-sighted I" You switched arrows. Did you retune your bow? If you just moved the sight pin there is your issue.
I re-sighted it in with the Nememis with field points, I had it stacking arrows with the field points. Then I put on the practice heads & the practice heads hit different than the field points.
You need to tune your bow with the new arrows. You can stack FP with a poorly tuned bow but put on BH and things change. I have seen corksrewing arrows hit the same at 20 yards every time. You are seeing this. Any BH on the front acts as fletchings up front. Longer BH than FP also changes reactive spine and foc. I bet if you moved your rest down 1/32"-1/16" it would help.