I use the 1075 caps on my Renegade. You can't seat the cap fully with finger pressure. I lower the hammer very carefully onto the cap, then "gently" push down on the hammer to seat it. You can tell easily when it is all the way onI tried this several tiems with an unloaded gun and could not make the cap go off, even by pushing hard.

You then have to pry the cap off with a knife or key or whatever else is handy, if you don't shoot the gun. I believe a cap put on like that forms a very tight seal against water too.