I got my new(to me) Roberston purist longbow recently and am having a hard time finding the correct arrow to shoot out of it. it is 75lbs at 28 and cut just left of center. I have been shooting a beaman ics hunter 340 loaded with poly rope and 220 grain muzzy phantoms. I am thinking about getting some aluminums and going from there. Do you think that 2315's will be stiff enough and can i get to 650 or 700 grains of weight? I was looking at CX heritage 350's or the Beaman MFX classic 340s for carbons but they get a little expensive if you know what i'm talkin bout.

Thanks!
Nate