I know that this is a topic that has been discussed, and a lot different opinions formed. I would like anyone to report your experience with it. Have you tried both the break in and non break in, and what were the results on both long and short guns? Nothing like information that is tried instead of what someone thinks or reads somewhere. One reason I'm asking is that I've never broke in a barrel and read the pros and cons but never tried it. I'm going to try it on my P90.