Similar to USN SAM I use a Gold Tip Traditional 5575 cut to 30.5". I put 100 grain brass inserts in the front and use a 175 grain VPA three blade Broadhead. I use 3 or 4 feathers, 4 inches in length in the shield cut style.
Typically I can get over 550 grains of weight. As said above. . plenty
Folks have used a ton of things INSIDE the length of the shaft to add weight, from pepper, to plastic tubing to weed eater cord etc. Heck, I played with an old Beeman skinny shaft and inserted yarn wrapped solder and the final weight exceeded 1,000 grains. It flew like a beast out of my 83# bow, but I broke two Beeman nocks on release due to their lack of robustness and the excessive amount of stress that did to the mix.
ChuckC