I would just like to add after shooting some more this morning to double check my results (which were the same), that there is definately more noise and vibration than before. I was using both brush bottons and string silencers. Also I am currently at the lowest recommended brace height with no arrow plate. The bareshafts are indeed hitting with the fletched but from what I have been reading the bareshafts should show slightly week which brings me back to my original problem of needing to add more point weight or a drop in spine also I would like use a arrow plate and sliencers which will further stiffen the shaft. The good news is after using the search button and reading up on efoc (which if I did my calculation right i'm sitting at 31.35%) I found something called Woodyweights that are used for wooden shafts, they from what I have read on there site can be used with a broadhead adapter too. They basically sandwich in between the broadhead adapter and the broadhead or field point and come In many diffrent weights! Im guessing I will need another 50 or so grains to set everything back up as before and I think these are just the ticket. I know that this is going to make for a heavy arrow with alot of weight foc but they do really fly great and what is the big deal if I lose a few feet per second? A .223 round moves super fast, but as I was told in boot camp by the DI/range instructor "this round can hit the nee and come out the top of someons head" ie.low weight high speed. On the other hand the heavy speer is the exact opposite ie. high weight low speed. Both will get the job done as they both have both been proven over time.I think im still going to try some 500's and compare them to the heaver/slower 400's and test them head to head for penertration.I just got a fealing the 400's are going to come out on top.Sorry for being so long winded any thoughts, comments, concerns?