BSA1
member
I have a Colt Police Positive Special 1970’s production that is occasionally not firing and binding up. It is driving me nuts because I can not replicate the problem. The gun is excellent condition on the exterior.
It has two issues going on at random;
The first one is the hammer will move partway back and then lock up when being trigger cocked for double action shooting. The hammer will not move any further back. Releasing the trigger and pulling the trigger again and it functions fine.
The other issue is it is occasionally hitting the primer way off center causing misfire.
I have been using my reloads so today we used a box of factory UMC for control ammo and my old Model 10 for the control gun. All of them fired the first time with no problems. The problem occurs with my reloads. I am using Winchester Small Pistol primers. For the record I have reloaded many thousands of this particular bullet, primer, powder combination. I tested the box of reloads that were causing problems in the Colt in my Model 10 and everyone fired without a hitch.
The gun functions fine most of the time when empty. It locks up perfectly double and single action. None of the primers on my reloads feel high and the cylinder spins easily when loaded. I have only been able to get the action to lock up once when dry firing. I did that by trigger the hammer partway bad, slightly releasing the trigger, then resuming the trigger cocking.
I have not disassembled this gun and have only cleaned the action by spraying oil into it.
I have never tried disassembling the action on a Colt Double Action revolver. However I have disassembled and worked on S&W revolvers many, many times. I have J.B. Wood’s book on revolver disassembly.
Ok.
What are some of the possible causes?
Any special issues with disassembly of this Colt?
Show and tell pictures;
Fired 50 rounds of UMC factory ammo.
One round (worst one) reload with firing pin barely hitting the edge of the primer.
It has two issues going on at random;
The first one is the hammer will move partway back and then lock up when being trigger cocked for double action shooting. The hammer will not move any further back. Releasing the trigger and pulling the trigger again and it functions fine.
The other issue is it is occasionally hitting the primer way off center causing misfire.
I have been using my reloads so today we used a box of factory UMC for control ammo and my old Model 10 for the control gun. All of them fired the first time with no problems. The problem occurs with my reloads. I am using Winchester Small Pistol primers. For the record I have reloaded many thousands of this particular bullet, primer, powder combination. I tested the box of reloads that were causing problems in the Colt in my Model 10 and everyone fired without a hitch.
The gun functions fine most of the time when empty. It locks up perfectly double and single action. None of the primers on my reloads feel high and the cylinder spins easily when loaded. I have only been able to get the action to lock up once when dry firing. I did that by trigger the hammer partway bad, slightly releasing the trigger, then resuming the trigger cocking.
I have not disassembled this gun and have only cleaned the action by spraying oil into it.
I have never tried disassembling the action on a Colt Double Action revolver. However I have disassembled and worked on S&W revolvers many, many times. I have J.B. Wood’s book on revolver disassembly.
Ok.
What are some of the possible causes?
Any special issues with disassembly of this Colt?
Show and tell pictures;
Fired 50 rounds of UMC factory ammo.
One round (worst one) reload with firing pin barely hitting the edge of the primer.
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