No. You are using a 40% by weight equivalent of 4198 to BP. It wound up being about 26 grains of 4198 for the load I was using. This left a very large amount of empty space in the cartridge, which resulted in radically different performance if you first tilted the gun either up or down before firing: With the cartridge pointed down, the powder was by the bullet and had very poor ignition. With the gun first pointed up, the powder was next to the primer and shot fairly well.
I wound up stuffing a small roll of toilet paper over the powder column and then seating the bullet over this.
Now I'm getting good ignition, and fairly consistent performance.
I don't think it's a good idea to compress smokeless powder. There may be instances where this is OK, but I know with voluminous powders like Trail Boss, this radically changes their ignition timing and pressure curve, resulting in drastically raised pressures.
This is NOT what you want when using guns dersigned for BP, especially 150 year old originals.. You want to mimic the performance (pressure curve and timing) of 2F or so BP...
-Tom