Being cheap and occasionally in the carbon shaft mood, I usually haunt Walmart before the end of bow season when they clear stuff out and pick up Carbon Express with 4" vanes, right hand offset. Last time, before stripping off the vanes (a real pain, by the way) I tried them on most of my bows. I found that by shooting cock feather in they shot fine with 175 grain field points, with no moving of nock point. I also found that 4" vanes shoot a 175 grain point/long insert combo just fine. Might work for you, too.