I do use RL33 in the .264. IMO, similar to but less bulky than RL50. I could get ~30-40 fps more from it (and RL50) than 7828. that gain put me in the 3220-3250 ballpark.
thing is, your load seems to be a mild load but yields 150+ fps more than what I am getting with quite a bit more RL33.
that is what I would be concerned about. wildly unexpected results might seem like a gift, but still raise the red flags.
do you have access to QL?
I had QL on a computer that died, so not now. I know of no published data for the .264 with RL -33. QL may be a good pretictor but I wouldn't rely on it as Gospel
Statements about using quite a few grains more (up to 5 grains on this thread) than my load of 72 and getting a lot less velocity is what I found interesting. I would think that would go to show that there is such a thing as "fast" barrels. I also think that a guy using 77 grains and achieving less than 3100 would signify that there are "slow barrels" (or a completely worn out throat)
Another possible point where error may exist is in everyone's statement of the velocity they think they are getting.
