Chronographed- Underwood 38 Spl +P 158 gr cast SWC

[mscampbell2734]

Propellants have come a long way. There’s many newer rifle propellants capable of producing higher velocities with lower pressures available to handloading community today. While there may be some here privy to non canister powder used by major manufacturers, I’m not.

I have no experience with Underwood or other boutique manufacturers products, but I don’t doubt what is possible today.

This is a valid point. The new US Military 9mm 115gr load has been chrono'd at an honest 1400 fps out of Beretta 9mms and is loaded to NATO spec, which is hotter then SAAMI standard but lower then +P.