Thank you for your reply, but I have a 2006 IMR Smokeless Power Reloader's Guide that I received from them early this week. In it is load data for following rifle calibers: 25-35, 30-30, 32-40, 38-55, 40-65 Winchesters and the 45-70 Government.
In the IMR Long Range Rifle Section, for the 30-30 Winchester they show 6.5 grains of Trail Boss with a 160 grain cast lead flat nose bullet.
This section also says, "The loads listed below are representative of common calibers used. As there are so many cartridges which could be used, only a few are shown. DO NOT USE FILLER WITH THESE LOADS, as fillers can alter pressure and velocities decidedly. Velocities were limited to aprox. 1600 F.P.S."
I called IMR at the phone # listed in the guide, inquiring about load data for .308 or 30-06. I was told they had done nothing with developing loads for this ammo. During the conversation, rep I spoke with at IMR never said NOT to use Trail Boss in these calibers.
Thanks again for trying to help me with your reply, appreciate your concern for my safety!