My gawd!! Will you guys never let up?? Hunted white tail and mule deer for years with 22" Ruger 1A in 7x57 - first 7mm for me, and it liked 150 Nosler Partition. Then the 24" Rigby 275 came out - and it too liked the 150 Partitions!! How could it get any better? Here it is - 25" 280 AI. Damn!! Now, it has been 50 years plus since my first deer licence - am I really done looking for the "best" deer cartridge / caliber / rifle??