"Proof does not insure much of anything. The worst offenders in the US market place have to be the Lee-Enfields that the Brits unloaded."
To this day the British military still uses an oiled proof test cartridge that exerts twice the force on the bolt and receiver on its combat rifles to ensure they will safely function under the most extreme conditions.
The United States military does not use an oiled proof test cartridge to test its rifles and is still buying M16-A4 rifles that dump its cyclic gases inside the receiver that causes the rifle to jam.
"Those without sin cast the first stone"
Under American law the Lee Enfield Rifles sold in the U.S. are not required to be reproofed nor are ANY inspections required before sale. The inspection requirements and safety standards are much higher in the U.K. than in the U.S. Therefore the "inherent weakness" is caused by American laws and NOT the Enfield rifle.
The British oiled proof test cartridge standards used today.
I'll take an Enfield Rifle and a Yuengling beer any day of the week.