45 acp +p

[PutTogether]

I couldn't afford enough .45 +P to hurt any of my 1911's.

[leitung]

i carry corbon +p in my kimber stainless II with no problems

[buffybuster]

can old colt 1911s handle +p ammo?

That depends on how old it is. Those made to the 1930's were had of low carbon steel with a casehardening of the frame and slide. Those made in during WWII had just the rail and lug areas of the frame and slide induction hardened. Neither one of these models are the best thing for shooting +P ammo or high round counts. In competition, these frames and slides shoot loose and some develop cracks through the slidestop catch (usually can be cured by drilling a small hole at the base of the crack or milling that section of rail out completely.

By the late 1950's mass production processes had progressed that frames and slides were through hardened.

Back to the original question, the old 1911A1's (in good shape) can "handle"(shouldn't kaboom) a modicum of +P loads but over time you would expect wear at a faster and greater rate than normal.