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Old December 7, 1998, 10:50 AM   #3
MAD DOG
Senior Member
 
Join Date: October 13, 1998
Location: Arizona.
Posts: 853
Rich,
The only time that springs will "set" is when they are improperly heat treated or stretched past their elastic limit.
Note that the springs on your car are in a continuous state of compression, and they seldom if ever fail. When they do fail, the usual mode of failure is outright breakage, rather than sagging or taking a "set".

Other things that cause spring failure are overheating, generally in the 700+F region;
Sharp bends, holes ordeep tool marks in flexed areas; Extreme vibration; corrosion, and the like.

The only spring failures that I have seen in my own firearms over the last 30 years are due to breakage. This has never occured in a magazine, bit usually firing pin springs or
recoil springs.

Generally speaking, a well made steel spring properly designed for it's intended use should last upwards of 100K cycles.

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