I haven't gotten around to ordering any of the Heritage shafts yets, but I shoot Carbon Express 4560 Terminator Hunters. Essentially the same shaft as the Heritage 250. 1.5 GPI lighter, camo Buff Tuff finish rather than wood grain.
I've only broken two so far, one I slammed into a rock at 15 yards, the other pulling it from a 4" fencepost (note the impact did not damage it, I did horsing it out).
Had a third snapped off by the first jump of a doe as it passed through her heart and exited. If she was a fraction of a second slower, that arrow would be back in my quiver.
I have no idea how many I've shot into fenceposts, frozen ground, trees, and frozen dirt clods with no damage to the arrow.
CX makes one tough arrow!