I have a ULA Model 20 built in 1990. It's in 284 Win. I shoot 140 grain partitions w. 55 grains of IMR 4350. You can load them yourself or have someone like Superior Ammunition load them for you. Melvin Forbes recommended this load for the 284. You can buy factory ammo in 150 PP. I use a 6X Leupold Compact on mine and have killed several sheep, caribou, elk, mtn. goats, etc. with it. Great rifle, very accurate, lightweight, kills everything you point it at. Just my 2 cents.