I went and got some powder and primers today. They had the CCIs all stacked together and I grabbed the wrong primers. I usually use the #400 SRP for .223 in my AR but I grabbed the BR-4 SRP by mistake.(bench rest primers) So is there really any difference between the two other than price? I don't really want to work up new loads to use only 1k primers. Wanna kill these ads? We can help!