Photos by Author
Today's lightweight revolvers are a joy to carry. Small and bereft of mass, they ride easily in a pocket and even more easily in a belt holster. If you can tolerate the high recoil impulse of full-power defensive ammunition, they are a viable choice for concealed carry.
A recent and extensive repair job for one of my clients reminded me that there is a downside to these pocket rockets: they simply won’t stand up to extended shooting like their heavier steel-framed cousins. If you shoot your lightweight enough, you will wear it out. How soon? That depends on how you treat it.
In days past, the major concern of these “alloy framed” guns (in quotes because technically steel is an alloy too) was frame stretching. In a light gun, defensive-grade ammunition develops a greater recoil impulse than it would in a heavier model. That force is channeled by the frame, and each round fired distorts the frame just a tiny bit.
Over time those tiny distortions accumulate, and the result is called frame stretch.
When a frame stretches, the cylinder develops front-to-back play, which is called endshake. As that increases, the cylinder acts like a slide hammer, battering the frame and accelerating frame stretch. At some point, the frame can stretch enough that the critical headspace—the distance from the cartridge head to the breech face, or the area where the firing pin protrudes—will increase beyond safe limits. The only remedy is a new frame, which translates to a new gun.
|The most common cause of excess movement is a worn latch pin hole.
Over the last couple of decades, revolver manufacturers have improved the metallurgy of their lightweight guns to better resist the accelerated wear of full power and +P ammunition. Their work has improved longevity considerably, and today’s titanium and scandium guns have made frame stretching far less common than it once was.
Because of this increased durability, these revolvers have a longer service life. They’re being shot more, and we’re now seeing some types of wear that weren’t a concern back when the frames wore out before the other parts!
Most wear issues concern cylinder lock-up—how well controlled the cylinder is when a round is fired. There are several wear points that can affect how tightly the cylinder locks at the point of ignition.
Safety first! Make sure that the gun is unloaded, then double check it. Remember to keep the muzzle pointed in a safe direction during your inspection.
First we’ll check for cylinder latching. Close the cylinder and gently push it side-to-side without rotating it. (That’s easier said than done!) If there is any side play, you may have a worn latch pin. Pay particular attention to the gap between the yoke and frame (at the front of the frame, under the barrel). If latching is extremely worn, you’ll see that gap widen significantly as you move the cylinder.
The most common cause of excess movement is a worn latch pin hole. This hole, directly under the firing pin, is where the pin in the center of the cylinder’s ejector star drops. As the cylinder rotates, so does the pin.
Friction between the steel pin and the aluminum frame can result in wear, and recoil can deform the walls of the hole, making the situation worse. In extreme cases, this necessitates replacement of the frame.
Next, check for rotational play. At rest, it’s normal to find a very small amount of play as you try to rotate the cylinder by hand. Any excessive amount can indicate a worn cylinder stop—that little part at the bottom of the frame window that pops up to lock the cylinder. It’s not unusual for that part to wear, or to cause the slot in the frame through which it protrudes to widen a bit. The solution is to replace the cylinder stop, which usually fixes the problem, assuming that there aren’t any other problems!
The reason we checked cylinder latching first is because a loose latch can easily be mistaken for a worn stop. If the latching is sufficiently worn, replacing the stop won’t cure the problem. It’s not unusual to find both problems in a heavily used gun.
We also need to check for rotational play at lock-up. Point the muzzle in a verified safe direction, pull the trigger, and hold in the rearward position. Check for rotational play again. If there is any, it indicates a worn hand and/or, once again, a worn cylinder latch.
Finally, check for cylinder endshake. Endshake is the back-and-forth of the cylinder when the trigger is at rest. There should be very little, roughly the amount of a sheet of standard notebook paper. Any more than that requires attention, even more so than on a steel gun.
A cylinder with excessive endshake will accelerate rearward under recoil, impacting the frame. The part that impacts is the extractor star, and in severe cases the very small surface area will imprint itself on the frame, further increasing the endshake. At the same time, all the other parts we looked at will experience increased wear because of the cylinder moving against them.
Though listed last, endshake is really the first thing that needs attention, as it can shorten the service life of your gun considerably!
The best way to keep your lightweight revolver running is through proper maintenance. The most important thing is to keep it clean. Dirt is an abrasive, and when caught between a steel part and an aluminum one, the softer metal will wear first.
Clean the latch pin thoroughly; do not oil it. That part of the gun gets quite dirty, and any oil will carry that dirt to the walls of the frame hole, where it will slowly abrade the aluminum.
I’m a believer in shooting my carry guns—it’s a vital component of realistic training. Of course, if you train as often as you should, this translates into a significant number of rounds through the piece.
Here’s the Catch-22: if you shoot the gun as you would in an actual encounter and you practice often, you’ll wear the gun out faster. One very good way to prevent that is to use standard pressure loads for practice. Of course, they don’t recoil as much as full-power defensive loads, which makes them less realistic!
If you expect to train as realistically as possible, you’ll have to accept that your gun will experience accelerated wear. One compromise is to do the majority of practice with reduced recoil loads, then at the end of your session, run some full-power fodder through the gun to reacquaint yourself with its recoil characteristics.
The best option is to buy a duplicate gun and reserve it for practice. This is the expensive way around the problem, no doubt, but it does have the advantage of giving you a second gun for those times when your primary is getting checked. If you shoot one of these lightweight wonders on a regular basis, you should definitely send it to visit the gunsmith occasionally!