Alright, I'm assuming you're referring to the ammunition of the Gunblade, correct? The World's Blessing is no problem, it's just you have to have one Mark selected at a time during battles. The One Question and Spellbane however... Those both have to do with the actual rounds, since one dominates the body of it. Having both would be useless, as you have the drawback of an explosive round and not really "combat suited" materials inside your round. Spellbane's perk would act differently in a non-buckshot round. It wouldn't fire a wave of magic disruption materials, but would instead fire a concentrated round meant to wound magic users and disrupt spells from that. Again, not a buckshot. So it would actually do more damage than the actual Spellbane wound wise. One Question's perk would remain the same, more or less. Caliber changed might adjust a few very minor things, but it would still cause the much wanted explosions from each shot, staggering and sending shrapnel flying upon micro detonation. So I really comes down to your preference. What do you think?