I've found vits data a bit optimistic. But using data out of the speer or hornady books is pretty close to listed velocities for charge weight.
A friend of mine swears by it for is .357 Magnum. IIRC, he uses the VV version of H110.
- Most likely N110. A most excellent powder for full power magnum pistol loads with jacketed bullets that are at or above mid-weight for the caliber.
I find it the cleanest powder, bar none, in these applications with a proper load. Numbers over the chrono are impressive as well, very low ES and SD numbers. 296/H110 will outrun it just a touch in the velocity, but at the expense of greatly increased muzzle flash and blast.
3n37 works well in 9mm. Good velocity, and very low flash out of short barrels vs. most other powders.