In general I'll go to Academy- Monarch brand for target/plinking. Although I've had a couple of duds from it. I've picked up some good deals at Cabela's too.
It really depends on caliber and if you're willing to shoot remanufactured. For .257 Roberts other than my personal reloads, CTD - Bitter Root Valley. For surplus, either CTD or Military Gun Supply. For .45-70, I just have to shop and see what I can find. I need to start reloading it.
2000 Camaro SS
09 G8 GXP