Yeah I shoot 54.0gr of powder in it. My barrel sped up some and I had to back down the load some and now I'm around 2830fps with 54.0gr. I started at 51.0gr and just worked up until I found a good load. I have a 0.208 freebore chamber which is pretty long so if you have shorter freebore then you might want to start a little lower than 51.0gr. Also, RL23 is pretty chunky so it's going to fill the case up. You might not get enough in the case to make the velocity you want if running shorter freebore or a bullet with more bearing surface.