If I recall correctly, about 15 years ago the FBI concluded that any aluminum frame semi would start having frame related problems after about 10,000 rounds. This was their justification for their disastrous adoption of the steel framed S&W 1076. I think the figure is a bit low, but that’s what you’re looking for anyway
You might try calling them at their academy at Quantico, VA – ask for the Firearms Training Unit. Typically, they’re pretty helpful. (I wouldn’t mention the 1076’s.)
The outfit that could help you, but probably won’t, is FLETC (
www.fletc.gov). They use several handguns to include Beretta’s in training and put many, many rounds through them. They also track all their repairs. However, they are extremely reluctant to say anything that might be an endorsement or a criticism of some manufacturer’s product.
No vendor is going to give you a straight answer on this.
Remember that if you don’t spend this money for new pistols, the bosses will use it for new drapes!