Out of my 3D bow I shoot GT pro hnters with a 130grs up front and for field I shoot x10s and for indoor spots I shoot 2413s with 180grs up front. In your case Id suggest GT xt hunters 5575s with atleast 100grs up front because in my eyes shooting 3D it more important to have an accurate arrow over a fast arrow and indoor Id suggest shooting GT 22s or aluminums but if you shoot single spot the xt hunters or pro hunters are plenty fine. If you want to use the same arrows for field and 3D id suggest accs in around a .400 spine. Got questions or need more info contact me on my profile page.
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