Most military handguns see fewer rounds a decade then a avid shooter puts out in a year. When IPSC started a number of competitors tried to use HP's but found due to the higher slide speeds generated by their lighter weight it was impossible to get longevity out of the HP design. Mind you this was for people shooting 100 000 plus rounds a year, and trying to hold 2" or better. It's rather well documented if you research.
You sort of forgot to mention that those very same IPSC shooters did and still do push the hell out of small caliber guns,particularly the 9mm. Sometimes known as the 9mm Major issue. You've probably seen that well documented as well in places like Brian Enos website. HPs are not the only 9mm pistols that have been worn out early due to that abuse. So imagine that - a steady diet of loads well over SAAMI pressure maximums, along with all sorts of wild and wooly spring weight combinations to increase cycling speed, wears pistols out prematurely. It's part of the reason the PF was lowered from 175,000 to 165,000 - competitors were not going to stop pushing 9mms and 38 Supers to make Major. And I'm aware you already know this because of the research you did - I'm just passing that along for anyone else reading here as you forgot to mention it.
And the CF inglis guns are being scrapped out at a regular rate. We have a supply of brand new in the wax paper pistols that regularly replaces the unserviceable pistols. They don't have a quarter of the life time that a ;more modern version will have.
As you are apparently a gun plumber or acquainted with somebody who is, just what does this "regular rate" amount to, per year? I'm genuinely curious, because the only thing related to the Inglis that has crossed my desk in recent memory is the Technical Safety Notice from July of last year, relating to the safety sear, complete with the two different NSN numbers. In looking at C-71-107-000/MM-000, C-71-107-000/MN-000, and C-71-107-000/NP-000, just what section of the inspections are being failed that is leading to this sudden, "regular rate" of replacement? Because again, having been sidecared into working for the RQMS for a while, and giving the gun plumbers access to the weapons vault as they did their annual inspections, I haven't seen Inglis pistols leaving, never to be seen again, with shiny new Inglis pistols complete with decal coming to replace them.
Yes, Inglis pistols do get written off at times; that's been true for the 30 years I've been in the CF. But I've also seen C7s get written off, Carl Gs, a .50 cal or two... all in the same time frame. The only weapon platform off the top of my head that showed widespread failure was the 106mm recoilless rifle. The breach blocks were cracking and they all did leave service at about the same time.
But again, I'm just an old infantry senior NCO, not a gun plumber, not in logistics, or anything like that. So if there is a sudden increase of Inglis pistols that are unserviceable beyond the repairs specified in the pams mentioned above, I'd certainly like to hear more about it. Can't possibly be one of the Divisions simply scrapping pistols instead of doing ordinary repairs because they don't see the point of repairing pistols while unused ones will end up going to the scape yards unissued, would it? Kind of like what was done with the C1s in some places?