Ran a powder charge ladder. Norma 217 vs Retumbo. Running low on retumbo so I thought I'd try looking for replacement. I've been running RL33 at 3410 fps. But I would like to get away from the very fast and heavy carbon build up. This was in my custom long range 264 win mag throated long. My hunting 264 is normal I run H1000 in it. Just thought this was interesting. Maybe it can help someone looking for a powder to replace Retumbo till it returns.