ok what are you guys talking about here? I've heard the term before, full metal jacket, but that referred to a magazine that was fully loaded. My Remington 742, .30-06 has a small magazine that holds 5 bullets.
Maybe I'm missing the mark- ??
...and on that day when my strength is failing, the end draws near and my times has come, still my soul will sing Your praise unending, ten thousand years and then forevermore!