I normally use Sierra Pro-Hunters (flat-based) bullets on deer, never had an issue with them.
I have had the 130 Gamekings and 140gr. Hornady Boattails grenade on deer, though, and that has soured me on boattails for deer.
I have NO experience with the 130 Spire Points, but my cousin has killed a schittload of deer with it, and I've never heard a complaint out of him. I'd not worry too much about it. Deer are easy to kill. Even those deer which I hit with the "bad bullets" died quickly, but it was REALLY messy. Hornady has fooled with that 140 several times, moving the cannelure around like they were shuffling cards or something. I do NOT trust that bullet for anything bigger than coyotes.
