I shoot a BW PLIII longbow...54# @ 28", I draw 28". I started out with the 250's and thought I had them bare shafting good cut to 30", but later found the 150's to be a better choice for me. They shoot very straight with/without fletching, and I can tell by the sound they are actually hitting harder than the 250
s simply because they are flying straighter (my opinion). I shoot the 150's cut to 29", 100gr. brass insert, 160gr. grizzly. The arrow ends up right around 595 gr. I think they would be a better place to start but you can order the test kit from 3rivers and try it out your self.
Have fun!
Ken