RE: Arrow wobble
Your spine is too stiff!!!! Just guestimating, but punching your numbers into OT2, I get that you should be around a .425 spine, and you're at a .370 spine. A 250 would be a better spine for you and would fix you better arrow flight, just guessing that your DL is 28.5" and you arrows are the same, but tweaking the numbers every which way, you have a LOT of changing to do to get those 300 to be "right-spined" for your set-up. Upping your weight to 68# and a 125 gr head will get you closer. But really a 250 arrow would probably sync better with your set-up.