Is it really necessary to start a load from scratch when trying out a different primer. After a few weeks I have found one load that I really like(.45 gap 200gr copper plated RN with 5 grains of W231 using WSP), found a good deal on some CCI 500s. The load I use is more on the low-med end, but I'm still fairly new to this, don't want to take any chances. Thanks in advance. Wanna kill these ads? We can help!