Sometimes rifle loads are published with a longer OAL than is standard for revolvers. But more often, they just chose to leave the load out of the revolver category because of the timing of their project.
Bullseye is fine for light loads in 44 magnum, but as velocity goes up, the pressure goes up dramatically. It is not suitable for full power loads. The Lyman data is also a poor source if you are expecting the load to perform with the velocity stated in the book. Lyman velocity figures only apply to their test barrels, not to guns that we shoot. You could easiliy get a load from them that puts the actual velocity into the zone where you get incredible fouling. I recommend you use a different manual.
In any case, stick with loads with actual velocities around 800fps if you are going to use Bullseye. The Lyman manual will not tell you that, but Speer will.