Here's another alternative on the Benos forum, more of a barber pole look for contrast: http://www.brianenos.com/forums/inde...dpost&p=881199
I usually look at the magwell. The consistency difference is slight, but it's there.
I dig practicing reloads with my eyes shut though. I like to be able to do it by feel, especially when there's other things going on that demand attention, like a moving target, me moving somewhere, or hell even if it's dark and I can't even see my magwell.