Rob- Yeah I completely tuned the bow to the 349's last week- retuned today -2413 slight nocking point adjustment - and shootin bullet holes
I shot a 210 with the 349's today --- 20 targets

Mobo- Both arrows are showing spined properly for the poundage?? Not sure

Funny thing is I started shooting the 2413's and they impacted pretty darn close to the same spot at 20 yards with 1/2 inch

Honestly I thought about and believe this may have something to do with it

I shoot a Gator Jaw release - that attaches directly to the string - I use a button underneath and nocking point on top- with the slimmer 349's there was oppty for play as the shaft did not take up the full space of the Gator jaws- the fatter shafts are using a greater amount of that space - Make sense ???