The trouble is I'm trying to get a rifle in every caliber. Then having so many 30-06's and 223's and 6mm's gets in the way in the gun safe's...
Prairie dog shooting is one area where I'd suggest multiple rifles in the same caliber is a great idea, espicially if they shoot the same ammo well.
This year in the annual cousins' dog shoot, I brought two 6mm's and two 223's. That was perfect.