7828 is my choice, I've got a Winchester 70 & Remington 722 in the 257 Robt's. I've used imr 7828 since it's inception in '87 & have never went back. There weren't any reloading books at the time with the load data for the new powder, I wrote Leupold a letter, they sent me information on the 7828 loadings with the Nosler bullets & I've been using it since. My loads are with 120gr PBT bullets, any brand brass I happen to have at the time, any large rifle primers. The last five shot ballistics I had on the Chrony were: 3298 3259 3248 3245 3230.