A couple years ago I bought a gas check making tool. Kinda labor intensive, and beer/soda cans are too thin to stay on the bullets. I bought some alum shim material .014" to make some that would crimp on the bullet, but again, kinda labor intensive. I could see no differences in accuracy, nor have I noticed any undo wear on my S&W 629, Ruger SBH, Dan Wesson 44H, or Puma '92...
In my normal way of thinking, KISS, I dropped most gascheck bullets and mostly cast flat based bullets