Alpha Capothe most common way to get bent arrows is a deer running tiwh one sticking out of them - maybe you've not had that problem ?

I stump shoot a lot - that bends aluminums quick too. If you shoot at bags etc, then you're probably minimizing your bending risks.

I like carbons

LBR Get a 400 shafts I imagine, yellow weight tubes, 100 gr inserts and those 300 gr broadheads Morrison has(I believe its Morrison) or some of the 200+ gr Ashby heads and you'll have your 800-900 grains. I have no idea how you'd have to cut your shafts to get a nice flying arrow though.