you should be alright, your right at the upper limit but still in the range. I shot for a while being underspined and the only consequence was i didnt have very tight groups at long distances and it made it tough to tune so fixed blades flew properly. Binaries is short for Binary Cam. If you dont get tight groups you can either drop your poundage back a bit or get new arrows. The cheapest solution is to drop the poundage back.