How come? Some groove/fit issue or something else?

I've found the Hornady RN's to be some of the most accurate hunting bullets I've ever shot; 160/6.5, 180/.308, 220/.308 and 300/.375 all of them are really superb. No RN is going to be a real long range performer, but for accuracy they are super.

Also, probably like the Woodleigh, the 160 Hornady tho heavy is shorter than a lot of the 140's, and might like the slow twist {1/10, I think the Rem has} of the .264 barrel. I've read {anybody verify?} that twist issues hurt the .264 with some of the longer bullets, tho it seems to me the high velocity obtainable might mitigate this.

I'm curious about your .264 as I really like the 6.5 caliber and have a spot on my place here where the skies the limit range-wise and deer pop up at anywhere from the muzzle to a knoll 500 yards away. Have mulled over a high speed 6.5 for a long time.