UPDATE: Per telephone conversation with Winchester today, January 3, 2013, the descriptions of each Winchester round are as follows:

Service Ammo: Q4392 is a 147 grain Bonded Hollow Point, sold to other LE as the RA9B;

Training Ammo: Q4395 is a 147 grain Encapsulated, sold to other LE as RA9147FMJ; and

Reduced Lead Training: Q4396 is a 124 grain FMJ Encapsulated with lead free primer. This is not a typo - I was told, and confirmed, that this is 124 grain ammo.