As for the foreign designed guns that use the weird rifling, (partial quote):"I don't own any guns with barrels that won't accept lead. "
I'm interested to hear what you find weird about Beretta 92 barrels or the rifling therein...
It looks identical to the rifling in my Ruger pistols.
Not one whit of ... excess pressure... have I seen.
What kind of pressure measuring equipment did you use to determine this?
I'm not trying to be nasty, but the kind of anecdotal "evidence" you provide is worthless.
Like a person claiming that playing golf in a thunderstorm is perfectly safe because he has played golf in thunderstorms all his life and never been struck by lightning.
Or like a person claiming that driving drunk is not unsafe because he's never had an accident while doing so.
Or like a person claiming that smoking won't hurt you because he's smoked 50 years and doesn't have lung cancer yet.
Just because a few people get lucky doesn't change the facts of the situation.
Furthermore, you don't know anything about the ammo or guns that people will be using when they take your advice. There are a large number of variables that play into whether the pressure goes slightly high or the gun blows up, and you haven't addressed ANY of them in your post.
If you're going to continue to recommend this (against the recommendation of a gun manufacturer that has been in business for around 500 years), you owe it to the people who are going to follow your suggestion to at least get some pressure measuring equipment and do some experimentation with a wide variety of calibers, gun types, and ammunition.