Britain did in the L1A1, their version of the venerable FN FAL until they switched to the SA80. So did Austria and West Germany (which later switched to the G3, still in 7.62x51 mm). The FN FAL is still in mainline military service all over South America and select post-colonial African nations. I don’t think any major industrial nation uses the 7.62x51mm NATO as their mainline infantry cartridge today but it sees service in dedicated marksman, medium/general purpose machinegun, and shorter range sniper roles.
Of course, the tendency for bullets to be deflected has far less to do with muzzle energy than bullet weight.
So are G3 variants.
The Colombian Army at least until recently used the Galil in 7.62NATO version that Israel sells to countries that retire their FALs and G3s but want to keep the 7.62NATO.
Among the NATO countries, Turkey has kept 7.62 as a standard infantry issue, replacing their G3s with a domestic product MPT-76.
But most conventional conflicts the US would be involved with these days would involve the bulk of the footsoldiers on both sides using mostly intermediate-cartridge assault rifles if only because of the absolute ubiquity thereof.
Finally watched this video. The main problem is, as they repeatedly admit themselves, a real wall is not made of unreinforced masonry but rather those breeze blocks would be full of concrete and steel rebars.
Not sure what one’s best choice of ammo is, but, according to the Marine Corps Gazette, in Iraq they were fond of a double-tap with a HEDP rocket immediately followed by a SMAW-NE round with a thermobaric warhead.
