I can sympathize. I've looked in vain around here for #1 buck, so generally it's 00 buck for my HD shotgun. I also have a supply of #4 buck to fall back on if I ever run out. But if target load was all I could get, I'd certainly use that, rather than leave the gun in the safe.
Join the NRA/ILA
I am the weapon; my gun is a tool. It's regrettable that with some people those descriptors are reversed.