Broadheads Grouping Left??
Last year I used Gametracker's First Cut 145 gr on a Terminator Hunter arrow weighing 500 gr. The First Cut's are an EXCELLENT flying broadhead and they hit with my field points at any range. The only complaint I had was that the steel seemed a little soft and didn't hold an edge well. Also with my short draw I would like a little flatter shooting so for this year I decided to try a little different setup.
I went back to my old CX 300's and have been trying to shoot Magnus Snuffers and Phantom broadheads(both 125 gr). With 3-4 inch vanes(with as much offset as I can get out of my JoJan) they come in at around 381 gr with an FOC of 12.9. I get good bullet holes when paper tuning but my broadheads group 2 to 3 inches left of my field points at 20 yards. I tried going to 3-5 inch vanes(12.5% FOC) but this didn't make any difference. I also tried increasing draw weight but still grouping left.
The only thing I can think of is going to a helical fletching and possibly feathers(which would give me 363 gr and 15.5% FOC), or maybe my arrows are just plain too light???