Over the years of being on gun forums and specifically involved with reloading sub-forums, I have read tons of threads where folks have ignored/challenged warnings from manufacturers and/or other reliable sources, when it comes to use of components or technique. Somehow after a century of metallic reloading by hundreds of thousands of folks, they have miraculously discovered something new and innovative that no one else has ever had the guts to try. They are like a modern day "Skeeter Skelton" or "Elmer Kieth". Somehow they know more than those folks actually involved in the design, development and safe manufacture of ammo and components, even tho they have only actually been reloading for a few years. The rest of us should surely jump on the bandwagon of their new and innovative development.
I understand the frustration of other reloaders. I too am stuck with tens of thousands of bullets, and hundreds of empty cases, simply because I only have 3-4 thousand primers of each variety on hand. With no relief of the current shortage in sight, other than paying a dime or more apiece. I too would love to find an easy solution that somehow everyone else in the reloading world has missed. But that ain't gonna happen unless I wish to ignore safety and reliability. One thing I would never do is to attempt to break in a new gun with ammo that is reloaded incorrectly, using improper components. While I too would be anxious to shoot a newly acquired firearm, I certainly ain't gonna risk destroying it with ammo I created using the wrong components. Did the OP get lucky and squeeze those oversized primers in the wrong size hole? Yep. Did he get to shoot his new gun with said ammo? Yep. Was it a smart thing to do? Apparently in the eyes of the OP it was. Just as was coming on a public reloading forum and bragging about it and proclaiming the rest of us have no idea.