Stan I use them with 209 Winchester data. The 12 is very forgiving. I do not load them in the .410 any more. Had three primer punctures in the .410 out of 500. Do not know if it was just a bad batch, a pressure issue, which I highly doubt, or just primer/gun issue. I've shot a lot of other type primers with that gun and had zero issues like that so I doubt it is the gun's fault. Also they tend to be a little harder to seat in some hulls than many other primers. I think the problem is that they are not as tapered as other primers.
Price can temp me to buy a different primer for reloading but with five or six different primers out there, and easily found, I just use them in the 12 and save "better" primers for the .410 like Winchester or Remington.
