For about a year now, I've been mostly shooting a short Browning Cobra. It's 50" AMO and I shoot 3-under. I've had a difficult time getting the arrows to fly right out of the bow. The spine seems fine enough -- at least it's predictably stiff or weak depending on what I'm shooting out of it. But they almost always porpoise downrange to some degree. There are days that I think I've finally got it licked and then I'll pick it up a couple days later & see the wobble again. I've never had this problem with my ol' Samick Sage. Flight is always straight and I've hardly ever had to mess with the nocking point once set.
I've played around with my nocking point a ton. It seems that I'm either getting nock high or nock higher. It occurred to me that it was probably time to put a new rug rest on it & that helped a little. Prior to that, I had taken a shot from about 6-8' away & snapped the arrow because it was flying so crooked (nock high).
On occasion, I move my hand up the string and take a few shots split finger and it always seems to like that. The arrow seems to lose its porpoising & go straight to the target. I can't say I've shot nearly the amount of arrows needed to call it a definitive fix. But it has me thinking...
Do short bows tend to prefer split finger? Or, put another way, are longer recurves more forgiving of where we grab the string?