Ok, help me diagnose this. First, this is another spare bow, I decided to work on just for experience and playing around. PSE Mohave with medium Synergy 3 cams. Wieght set to 69#. Draw set to 29.5". New cables and string. Cam timing seems perfect. 1st gen MZE rest. 42" ATA Around 7" BH. 100gr tips.

I always shot Beman hawks 400 cut at 29" with this bow. Worked thru several interference issues. Always getting a left tear (fletch to the right, tip to the left) and bad groups.You can move the rest all teh way left or right and same thing. Tells me interference.One my MZE wasnt' dropping as fast as needed (about 4-5" from full draw). So I set it up to drop within 1.5" of full draw. Helped alot. Found out my cables were close, but should have cleared them by eyeballing. Moved them over. Still can't get the 400 hawks to get perfect tear or group. Always left tear (fletch to the right, tip to the left). But only slightly, maybe 5/8" tear now.

So I tried a few more combos, and found .340 spined black max shot bullet holes. So did .350 carbon express CX. Groups pretty awesome for a spare bow. This is kinda nice cause this is for my main compound. But I want to know why. But from history of this PSE, this makes no sense. The .400 spined hawks should work, it used too years ago. Also, all charts, show .340 black max to be too much spine. And the .350" even more way too much spine. I bet I shot the .340" spined arrows 10 times and awesome bullet holes.

So why would a stiffer arrow work better when its not supposed too and never did before. All I can think of is the cables and new string are 450+.

Tonight I will drop poundage to 65 or so, and check again.

This is just playing for a spare bow. But for my info, would like to diagnose the issue. This tear is always tough to fix. And would like to understand it better.