I'm shooting a Ravin R-29. It's shooting 425gr firenock bolts with 3 blade Grim Reaper mechanical broadheads approx. 420fps. This combination works really well for me. I killed my biggest Buck to date with it last year. He went about 30yds at a dead run and fell over within site of the shot. I shot a Big doe with it opening weekend this year so far, same results. I got a Good buck on the trail cam. Looking forward to getting back out there in a week or so.