From what I have read, RL33 likes to be loaded close to the lands. From the testing I have done with the RL33 in a 338 Edge I have gotten a big jump in velocity. 300 gr Berger OTM's shot an average of 2997 over my Magnetospeed
. First loads were seated .040 off the lands ( the same seating depth as my H1000 Load ) in new Bertram brass. I am going to load up some this week at a longer OAL to see if it makes a difference.
Initial test showed 1/2 moa groups at 200 yards and consistent hits on the steel gong at 1200 yards. It shoots 8 moa over my H1000 load in the same rifle.
I plan to do more testing with various seating depths and at various temps as the winter season progresses.
I will post results of those test when I can.