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In observing the discussion of the reliability, longevity, and overall performance of 1911s, I find that there is a huge disparity
in what folks consider to be “a lot of rounds” or a reasonable test cycle. It is not uncommon to hear that someone’s
gun has “never given them problems” or “runs great,” only to find out that they have only shot 100
rounds out of it over the span of two range sessions. Since this site is aimed at professionals and serious students who
could benefit from quality information and discussion, I thought it would be worthwhile to put some hard numbers out for discussion.
Keep in mind that the component and build quality of the gun, as well as the type of ammunition and magazines, can drastically
affect performance. The numbers below are guidelines, determined from my own experience and observation over the years.
They are also related to full sized, steel frame 1911s firing full power .45 ammunition. Handbuilt competition 1911s firing
reduced power handloads or those fitted with compensators tend to exhibit different service cycles, and many of them tend
to last quite a bit longer.
Reliability Intervals:
First, let’s consider what should be a statistically significant round count interval. Firing 50 or 100 rounds through
the gun is not worth terribly much as far as diagnosing its overall performance, unless you are looking at a very specific
area. If you are doing very focused performance testing, 50-100 rounds can be worthwhile if you are looking for an expected
outcome. For example, if you need to see if the gun is ejecting consistently, 50-100 rounds will give you some decent information.
These 50-100 rounds may be fired at the berm, while observing the ejection pattern carefully, and would not constitute anything
other than function firing. However, to get a bigger picture of overall performance, 300-500 rounds is the minimum you should
accept before making any judgments regarding overall performance. If you are watching the gun closely, it is possible to
get a pretty good read on the weapon’s performance within 300 rounds. If I built the gun, I can usually predict how
it will run after a 200-300 round test session because I am looking closely at certain criteria.
To stretch out the discussion point here, I personally consider 1,000 rounds the standard interval that I examine for reliability
and function. If a particular gun/ammo/mag combination will run for 1000 rounds without incident, that is meaningful to me.
One malfunction in 1,000 rounds is the maximum that I will tolerate, and even then I am looking very hard for the root cause
of the problem. Since the original 1911 underwent a 6,000 round trial without malfunction, it should be reasonable to expect
a properly set up weapon to duplicate the same performance with quality magazines and ammunition.
Longevity:
The mainspring and sear spring are under a very light load, and quality units tend to last longer than the round count milestones
discussed below. Neither spring typically requires replacement in normal service, which includes keeping the hammer cocked
at all times. The longevity of the fire control components – hammer, sear, and disconnector – will vary based
on the quality of the parts. High quality machined parts that fit are fit and set up properly in the gun will generally exceed
the service cycle milestones listed below with no noticeable change in feel or performance.
Round Counts – Meaningful Milestones:
The 1911 platform will last far, far longer than the 6,000 rounds from original military trials. However, that long road
is not without meaningful milestones that should be respectfully and diligently observed by the dedicated user. These intervals
that follow apply to my experience with 5” 1911s shooting .45 ACP, and each gun is going to be very different.
500-1,000 rounds – If you are running a synthetic buffer in your gun, this is the interval at which you need
to replace it. If you wait too long, the buffer will come apart inside the gun and tie it up. Five hundred rounds is a reasonable
interval at which to perform basic cleaning, lube, and maintenance on your 1911.
3,000 rounds – Every 3,000 rounds should see the replacement of the firing pin spring and the recoil spring.
Timely spring replacement prolongs the service cycle of the weapon.
3,000-10,000 rounds – This seems to be the lifespan range of the average slide stop detent plunger and the accompanying
plunger spring. Why is this significant? The detent plungers, if made to the original ordnance specifications, are only
surface hardened about .002” to .005”. More often, modern pin sets are not made to such specification, and the
tips of the plungers flatten out with age. A flat headed plunger does not exert the appropriate tension on the slide stop,
and in conjunction with a weakened plunger spring, can lead to premature or false slide lock malfunctions. Make a habit of
periodically examining your slide stop plunger when you perform maintenance on the gun.
5,000 rounds – This is what I find to be the average lifespan of the modern internal extractor. Yes, plenty
last much, much longer, but plenty also last only a fraction of this round count. Once an extractor starts to log this many
rounds, I will either replace it preemptively, or replace it at the first hint of failure (ie. erratic ejection). The extractors
often will continue working with some retensioning, but that can sometimes just be a temporary fix. The key issue here is
that extractor failure is typically only recognized by the shooter as a stovepipe or double feed malfunction, where that really
is the most extreme situation. If you start seeing rounds ejecting forward, left, and straight at the shooter’s head,
THAT is the beginning of extractor failure. This milder type of failure is often dismissed, which is why extractors may often
seem to last longer.
20,000 rounds – About the time to start giving the gun a comprehensive overhaul to look for worn components.
Slide/frame fits often are a bit loose at this point, and retightening them can give the gun a whole new feel.
20,000 – 30,000 rounds – About time to start looking at the bore if you’ve been shooting jacketed
ammunition the whole time. However, as long as there is some rifling left in the last 1” or so of the tube, a good
barrel will often continue shooting just fine. Thanks to John Miller from AMU for that nugget of wisdom. I have a gun that
is missing a large percentage of rifling in the first third of the barrel, yet is still a tack driver.
50,000 – 70,000 rounds – A lot of guns start to really show their age once you get past this mileage point.
Slides and frames can start to develop cracks, and excessive wear in various small components starts to add up as well.
Broken or loose ejectors, cracked thumb safeties, loose ambi safety shafts, broken hammer struts, broken slide stop lobes,
loose plunger tubes, and loose sights are all common ailments of the small parts. It’s time for at least another rebuild,
this time you may need to look at replacing the slide and barrel. A lot of life can be squeezed out of the frame as long
as the pin holes remain round and the barrel bed is not too worn from barrel lug impact. Ultimately, it may be easier to
retire the gun at this point, as you may end up chasing a lot of different breakages.
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