Well I got this bow sanded & tips narrowed left the tips stiff, shot it in and it ended up at 54 lbs it was shooting across the chrony at 159-160 with a 500 grain arrow but the bow was a bit shocky so I didn't want to narrow the tips more so I rounded them out as suggested & eliminated most of the vibration but lost about 4 fps it's now shooting 155 fps with B50 but it's a fun accurate bow I'm going to make a FF string for it I'm guessing it will end up in the 160s will post it when I get it dressed up