Tyler thats a good tip. I used a permanent magic marker to color the primers in the tray. When duck hunting I would put a V on the shell head face for 5 shot, a 0 for 6 shot and two lines for 2s for geese. Could tell them apart in the near dark. Knew which of my three go to loads they were instantly. Never wanted to be shooting sixes at geese given time to switch or worse twos at a teal. Talk about overkill. Remington RXPs were my favorite hunting shell for years and those were saved for hunting loads only. What ever system you find is an aid. Shaking shells does not tell you much.
