60 or 80 on a sheet, replace them after each event if they get dirty. You can also laminate the label with transparent tape making it quite durable.
And thicker.
Personally, instead of making/printing labels, and worrying about checking them, cleaning off the magazine, and putting more labels on:
http://www.walmart.com/ip/Sharpie-Silver-Metallic-Permanent-Markers-2-Pack-Bundle/15026847BUT----everyone can do what they want, and that's all good.
I've always got a black sharpie (for range stuff) and a silver sharpie (for equipment stuff) in my range bag. For my purposes, they handle everything and I KNOW it won't ever bind my mags.
That actually reminds me that this is the month I need to go through and check all of my equipment (and my backup equipment) for the year, and to clean out and re-stock my competition range bags. (Amazing what weird stuff gets left in there after a year.) Between switching between four different competition types (USPSA, IDPA, Steel Challenge, and Multigun) and shooting matches both here and out-of-state, it really gets ridiculously unorganized.
I keep meaning to have separate bags set up for each version....maybe this is the year I finally get around to that. It WOULD make my life easier...
Can't say that I've seen you fumble any reloads. (But I did see you shoot a stop plate out of order.......ONCE! )
You know, I think I've only done that twice in my entire life in a match. I've screwed up in all sort of OTHER ways, just not normally the "out of order" thing.
[grumble grumble] And I had a mike on Outer Limits this past match, too, which really hurt because the run WAS going to be a decent one. Even had that "ding" noise of the bullet hitting metal. Too bad it was the plate holder, not the plate itself.
I DO fumble reloads all the time. You just can't normally tell because I'm running from one shooting position to another, so I have a lot of time before anyone can tell I don't have the gun loaded yet.