I rarely post but lurk quite a bit. I have a 264 Win Mag Sendero II - purchased it probably 5 or 6 years ago and unbelievably, never worked up a load for it. Oh I'd try now and again at load development but I have some other rifles I shoot more so I wasn't in a big hurry. Still, I grew frustrated at not being able to develop a good load. Plus, as many of you know, 264s are not easy guns to develop. I ran several online searches and kept coming back to the information you guys have posted and FINALLY, I was able to develop a load which I think will be a good one. 66.0 gr Retumbo behind a 140 AMAX. Quickload says it's going a little over 2900 - not blazing (I'd like to get 3000) but doggoned accurate. If it wouldn't have been for all you folks, I think you'd see a 264 Win Mag in the "For Sale" section. Honestly, I think this site is THE place for 264 load data. Thanks all!