In the 1960's the late gun writer Skeeter Skelton wrote an article addressing two popular thoughts about Colt automatics.
One was that the Gold Cup National Match was not made to shoot full power .45 ammo and Two, that the aluminum framed Commander was too weak to do much shooting without it breaking.
To test these ideas, Skelton and a group of volunteers fired 10,000 rounds through each gun.
The Gold Cup fired all 10,000 with no problem. Skelton noted that the Gold Cup shipped with the same recoil spring as the standard Government Model and a lighter spring for Mid-Range target loads. If the Gold Cup was not intended for use with full power ammo, Colt would not have installed the standard recoil spring.
Inspection showed the Gold Cup with what looked like only break-in wear.
The Commander showed a small crack in a non critical area of the frame. They decided that it could have still been fired safely for many more rounds.
As I recall, since then Colt has increased the strength of the aluminum alloy used in their frames.
Everyone says the aluminum framed models are really intended to be carried more then fired, but if a 1960's model can go 10,000 rounds I doubt any normal owner would shoot anywhere near that amount, so the question is sort of moot.