Currently shooting 440-445 grains, which come in at 10gpp for me, and shoot fast and flat. I need to shoot sitka spruce to get that weight. The spruce don't seem to hold up well for roving though, so have mostly shot doug fir, and will go back to those, which come out around 470 grains, around 10.5- 11gpp. That's the lightest I can get with the (parallel) fir. May try them tapered, which would bring me back down to around 10gpp. I find the difference noticeable, but have more confidence with the fir, and the trajectory is still reasonable.