Finally, as mentioned above...shoot with an arm guard and/or your heavy cold weather clothing before you get in the field. String contact with the collar, sleeve, armguard, zipper...all have an effect on POI. No bow, now release, no fantastic shooting theory will overcome string impact. Doesn't take much!!! Even if you have no string contact the heavy clothes can effect your anchor point / head position too. And don't just stand at the shooting line and shoot like a California high wrister
Get on your knees, sit on your buttox (maybe even in a chair), and shoot back over a shoulder, up, down any way you can think that you may end up needing to shoot in the field. Hunters rule...your shot opportunity will most likely come where you least expect it.
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Finding this out myself right now. Hunted east side early season, thin pants, short sleeve shirts, just like home, no worries! Now looking at going out late season west side. heavier, water proof clothing.. Getting wrist slap on jacket, POP, sounds like a suppressed 22 doing off, no amount of change to my hold or arm position is lessening it. Never had any hint of slap before the jacket, so now I need to go out and get an arm guard to tame the jacket and practice before sunday. Gloves also altered how the bow sits in my hand and moves on shot so adjusting my grip accordingly.
Thanks for the tips guys, saved me potentially bad shots in the field when it really counts!