Difference between a gold ring and a pull tab using polar plot!! V3i

[rsarge1]

I've had a lot of down time from hunting lately so I've been exploring the v3i inside and out LOL.
I think I've found a way to tell the difference between a gold ring and a pull tab using the polar plot screen to analize with on the v3i. see attached screen shots of the polar plot, one pic is for the gold ring the second is for the pull tab notice the difference between the lines when it is a ring the lines are tight almost lined up but when it is a pull tab see how the lines are seperated far apart, I've tried this with 2 different rings with the same results, if I'm correct this will stop a lot of digging pull tabs LOL. the only problem is it does not work for can slaw or foil only pull tabs.
sarge ::