recoil buffers

Installed one of the recoil buffers in my Mini 30. I found that my Promags will not feed the first two rounds with it in. Basically the operating rod is just barely coming back far enough to clear the mag with the buffer installed. With 10 rounds in the mag its a tight fit. I guess I need that extra 1/4 inch to get a little more umph. Kind of like a running start. I'm thinking about cutting the buffer in half. Basically splitting it and making it only 1/8" thick. Anyone else have the same problem?

Brett