Rick--
Sad but true, sir. FLGCs were coin of the realm in the 308 in entirety, and only about 2% of my 223 shooting has been conducted with the Proper Projectiles. Mea culpa!
I've been casting since 1981, but rifles entered the fray rather slowly. The 30/30 WCF got things started about 1983, I think the 45/70 came next a few years later. Once i promoted to Detective things got crazy busy, and rifle casting stagnated until the mid-1990s. By that time the 308s were replaced by 30-06s, and those took to castings like ducks to water--just like the 30/30 had and with the same bullets. I haven't looked back.
More of my 308s were gas guns, too--HK-91, a couple M1As, and an FN-FAL. The HK and FN are not kind to cartridge brass, Kalifornistan didn't like the things, and I made way too much money selling them--and in those toys cast bullets might have been a bridge too far anyway. The late Bruce B had his Fulton Armory M1A running very well on Lyman #311467s at an NCBS meet some years back, and another M1A might find its way to my doorstep again.