I mean. Off hand in 10mph winds in 4 shots felt like more than a solid try
But sure. Better ammo would be, well , better
https://www.instagram.com/p/B-NaSStp...=13vad9uigcid0
You would have to set up in advance, but a dab of RTV caulk might be what you are looking for, after I spent 7 years working in my wife's graphics business I am a huge fan of gluing with the stuff. It never hardens, and that might be the ticket. Before I learned I did a major project with rigid adhesive tape and it failed, it doesn't take much thermal and moisture expansion and contraction to break some pretty small bonds.
ETA: You could probably glue some on 3x5 cards that could be clamped or stapled when you got to the range.
I don't shoot my MKII a lot but I've tried 4 or 5 different brands of ammo. CCI std. velocity is my favorite for both my CZ and my Ruger. I bought a 5K case last fall.Cci Standard velocity has been the best despite being cheap
In the P-F basket of deplorables.
How about an alligator clip photo/card holder like this?