I bought a couple hundred 45-70 loaded rounds from a TRUSted club member today. They are loaded with Cooper bullets. Does any one have any idea who they are? I bought the ammo mainly for the brass,BUT if it shoots good or better,I'd like to get more bullets. Half is loaded with 55gr Black powder and the rest is loaded with 24/4759. The bullets are 400 grain jacketed flat nosed.they have 2 cannelures.