I'm shooting black eagle x-impacts shafts but not with they're outserts or the valkyrie system. I used the pierce insert system from gold tip, which is a half- insert(allows using standard FPs and BHs thread pattern) and they're ballistic collar together. Haven't broke one yet, just lost a few. I'd have to measure again, but if i remember correctly, they measured around 33" from VON to BOP.
Easy to get high foc with them, I'm shooting 500 spine, (5.9 gpi I think). My total weight is around 450gr and I'm shooting 200gr points, insert system weighs around 40 gr. Great arrows