Bareshaft tested about 15-20 groups over the last couple days. Whatever I'm doing wrong in arrow spine is somehow correcting itself downrange. I shortened my draw to 27" (using a clicker) for a more consistent release. Bareshaft showing stiff and nock high (nock high right) but still landing with fletched out to 20 yards. At 25 yards, bareshaft are about 8" low and 4" left. 20-30 grains up front and a lower nocking point may correct that out, I'm thinking.
Before getting the 340s, I was shooting 400s cut to 29" and 250 grains up front, pulling to 26.5" draw. Flight was perfect but gaps were huge.
Maybe I just have consistently bad form