^^^This.
Ammo doesn't get much cheaper than Federal "550" and Remington Golden Bullet bulk packs from Wally World. Test both and use whichever is more accurate in your gun(s). Both are generally more accurate, cleaner, and much more reliable than Remington Chunderbolt.
(Chunder is Aussie slang for vomit. Pretty clever summary of T-bolt I think.
)