Captain Crossman wrote:
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I've had (2) brass framed Colt replicas, pull the arbor out of the frame and destroy the gun, from shooting them- and needed to replace both frames with steel ones.
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Arbors don't pull out of a frame from shooting.
Think about it. The recoil goes backwards - not frontwards.
Then there is a feature called a recoil shield. Guess what? They call it that for a reason. Recoil from the cylinder is absorbed by the frame - not the arbor/frame junction. The cylinder floats and is not connected to the arbor - hence, the rearward recoil from firing does not stress the arbor pin.
When revolver is fired, frontward force placed on the arbor comes from the resistance of the ball as it enters the forcing cone and is pushed down the barrel. There is more force placed on the arbor when the balls are seated into the chambers!
Since the mass of the barrel assembly is enormous compared to the mass of a little tiny ball, according to Sir Issac Newton, the ball moves - not the barrel.
Of course, some of the combustion gasses that follow along behind the ball as it travels down the barrel will be pushing on the barrel and forcing cone area. This force is very small otherwise the revolver would jump out of your hand and fly downrange while the ball would remain behind and drop onto your toes.
If an arbor is pulled out of the frame it is most likely due to abuse from some bonehead that hammers the wedge in too tight.
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Pardon me if this explanation is too technical - some of the grease monkeys out there might not get it.