After seeing how well RL33 performed in my 338 Allen Xpress, I was very excited to see how it would perform in my 7mm Allen Magnum which is also based on the 338 Lapua parent case. From everything I have been seeing, RL33 is producing 90 to 150 fps over what Retumbo has been producing in same chamberings. Wanted to see how ol' Green would do with the 180 gr Berger Hybrid Hunter and this new powder. To get a better idea of pressures generated to compare it to my Retumbo load I formed up a new batch of 7mm Allen Magnum brass. Out of old green (26" barrel length) with its Rem 700 receiver, I do not push things overly hard. My standard load for the past 4 seasons have been 95.0 gr Retumbo under the 160 gr Accubond which gives an average velocity of 3414 fps. This load just starts to show some slight primer cratering around the firing pin divet. This is more to do with the large diameter Rem firing pin then anything but its a good place to stop. I developed this load with Retumbo adding one grain at a time at 75 degrees and stopped when I went from no cratering at all on the primer divet to just slight cratering with 1.0 gr increase in powder charge and stopped there. This is simply because I do not want to push the Rem 700 to hard. So, I wanted to see what the new berger bullet would do with this powder, even if it does not shoot well in this long in the tooth barrel, at least I can get some good velocity testing. I started at 93.0 gr and worked up from there with the freshly formed new Lapua brass. 93.0 gr.....................3065 fps Extremely low pressure, increase 2 grains 95.0 gr.....................3152 fps 97.0 gr.....................3244 fps 98.0 gr.....................3270 fps 99.0 gr.....................3308 fps 100.0 gr...................3329 fps No primer divet cratering at all 101.0 gr...................3358 fps Very light primer divet cratering Working load for old green. So with what appears to be very similar chamber pressures, it takes 6 grains more RL33 to get a 20 gr heavier bullet within 60 fps of my standard 160 gr Accubond load. Now figuring the BC advantage of the Berger bullet, this will be a dramatic improvement in down range ballistic performance. Again, this is in a Rem 700 based rifle so I do not push things hard at all. When I get a chance I will test this new powder in one of my Raptor Stalker (27" barrel) or Raptor LRSS (30" barrel) and develop loads using Norma brass to find the pressure limits of this powder and bullet combo. With Retumbo, I have already tested the 160 gr Accubond in one of my Raptor LRSS and it was easy to top 3500 fps. In fact, using the Norma brass, Top loads in those testes topped out at an average of 3540 fps and primer pockets held up to 5-6 firings. Using Lapua brass, there was ZERO sign of any pressure issues at all and primer pockets never loosened up. Using that as a reference and seeing what LR33 had done so far, I would predict that the 180 gr berger Hybrid Hunter could in theory be driven to very close to 3500 fps out of my Raptor LRSS rifles and likely 3450 fps in my Raptor Stalkers. Again, theory but will be proving very soon. So far I have been very impressed with RL33. In everything tested so far, it has shown 90 to 150 fps more velocity with what appears to be identical chamber pressures. STill have to see how it does as far as temp sensitivity. I have heard for years how terrible the RL powders are with temp changes. Personally, I have never really seen that. Now, if you load your ammo to max pressures in cooler temps and then wonder why your seeing pressure signs when its 80-90 degrees out, well, we need to be smarter then that and I know most everyone on here certainly is. Simple fix, develop your loads when its hot, rechrono when cool and record your velocity. No worries about excessive pressures. I have heard mixed results about RL33. Some have said its extremely stable, close to on par with the Hodgdon powders. A few have said it is terrible but many of them seem to have something against anything except their preferred powders so until we get more widespread data, its a wide open topic in my opinion. Having worked with surplus ball powders for many years and dealing with their temp issues, I guarantee RL33 is far better then any of those powders over wide temp changes so to me, its really a moot and relatively unimportant point. Many ways to cross that bridge with little fuss. Anyway, going to do some testing with the 160 gr Accubond as well to get an apples to apples comparision using RL33. I suspect that 3500 fps will be easily attainable in ol' green with this new powder. More to come.