This is a bit of drift, however it is about cannelures and .223. I purchased two different 55. gr. FMJ bullets last year and one had a significantly wider cannelure ;than the other like 50% perhaps. At first I didn't know why, but one thing I discovered was that I needn't be too concerned with trim to lengths as I could just stuff the ends of the brass down into the cannelure and they fed fine (using a Lee factory crimp die). Is this why some companies have wide cannelures? Is this totally safe? I discover a little gem of knowledge or just get way with poor practices?