I have been very impressed with the 140 gr Speer Nitrex cartridge (with the Grand Slam bullet) and have taken some really nice bucks with it.I have ordered them recently off the Cabela' s website.I have also been reloading some Nosler Partition 125 gr as well .Remington once loaded a cartridge with this same bullet but stopped a couple of years ago.I would like to see more factory loads with a premium 120-125 gr bullet because I think this is optimal weight for the 260 caliber.