38SC w/ 3N38 Load Data

[Reibtrain]

I would stay with 10.0 and tinker with the OAL just so you're only adjusting one variable at a time. Like SS said above, shorter OAL reduces the case volume and increases the pressure.

As far as the OAL, you'll have to play around with it based the bullets you are using. Each bullet profile can effect your max OAL, so see how far out you can load them without magazine feeding issues and still pass the plunk test in your chamber.

Thanks for sharing your results, I'm working through the same effort to find a sweet spot load.