Thought this might be of interest to some of you DIYers who can't find other brands of caps or just want to make your CCI's as good as any other. I'm relatively new to BP and had to resort to making DIY caps since no others were available. Recently found a good stock of CCI #11 and didn't want to buy different nipples, or squeeze these with pliers to make them fit better.
I made a simple push-thru sizer which does the trick and makes CCI #11's fit nicely with only a firm push. A tapered hole(3 degrees)through a scrap bolt head with the small ID finished to .171" works perfectly. The punch is held into a block of Delrin plastic which is attached to my small bench press so I can keep one hand on the press and the other feeding caps into the die. Took me about ten minutes to size 100 caps.
The only concern I had was if the priming compound would crack and fall out of the caps which didn't happen to a any.