I loaded up some book max loads in 45acp for hunting and they are grouping great and my 1911 colt seems to love them ...but ....how long can i shoot this 45acp+p max loads before i need to change the spring to a stiffer one or is it a case of if it ain't broke don't fix it?Am i worrying over nothing or do i need to alter the colt before i tear something up?
she ran 50 XTP's fasssst in a row without any hiccups...but the grip screws got loose...

Can't have much to say unless we know what you're loading. As much info as possible would be helpful.

HS-6 powder loaded 9.4gr.@950fps. from Hornady manual 200gr.XTP no pressure signs, new colt government 5in.barrel series 70....book say's i can go up 0.4gr.more for 1000fps. but i'am stopping for now...

A good rule of thumb is to change the recoil spring every 2000 rounds or so with full power loads.

Maybe more with "hot" loads.

What lb spring are you running?
I use an 18 or 18.5lb spring with normal factory type loads.
I use a 20lb spring in a Commander.

Once upon a time, when I was loading the 45ACP "hot" I used 24lb recoil springs.

An extra power hammer spring is a good idea when using hot loads as well, as it keeps the slide closed a little longer.

Thanks NE 450NO2... thats the info i'am looking for..The springs in it now are stock from the colt factory...