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05-04-2024, 03:31 PM
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Extended revolver firing pins
I already have an Apex pin installed in my 66-7.
I tried installing the Wolf Type 1 spring kit (or whichever one is “duty” rated.)
I like the trigger pull, but it is not completely reliable with magnum primers. About 17% fail to ignite when shooting double action, even after double-seating the primers. This holds true with factory magnums as well.
Is there a firing pin that’s maybe a hairs-breadth longer than the Apex?
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05-04-2024, 03:49 PM
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I know Powers Custom makes long firing pins for "hammer nose" firing systems. I don't know about frame mounted firing pins. I think maybe TDK does.
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05-04-2024, 06:35 PM
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I like the Power Custom firing pins for both old and new systems. If the current firing pin is over .495, a longer one won't help any unless you have excessive headspace (not too common). You need more spring power. I would try a Wilson mainspring. Those give the best combination of hard hit and light trigger pull of all the aftermarket ones.
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05-04-2024, 08:40 PM
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I like wolf springs for the most partbut the ribbed main spring usually needs a longer tension screw .other main springs are flat(no rib)and work with original tension screw. your tension screw is probably setting in the rib of the wolf spring.
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05-05-2024, 08:22 AM
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Thanks.
I ordered a pin and extended strain screw from TK.
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05-05-2024, 11:32 AM
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I have always used a stock mainspring and adjusted the tension screws length so that when tight it is 100% reliable. I used to get all into polishing and smoothing the spring.
Back off the factory screw until you get miss fires, turn it in 1/4 turn at a time until you have none. Turn it in until tight counting the number of 1/2 turns until tight tight. Measure screws length and then take away .016 per 1/2 turn. Leave 1/2 turn of length. You can always file off more, you can't add any. You can buy all the blue or stainless 8-32 screws with the correct head from an Ace Hardware that has the gun screw trays.
Last edited by steelslaver; 05-05-2024 at 11:39 AM.
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05-05-2024, 01:41 PM
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Best choice is to use the real S&W mainspring and the real S&W firing pin. Tighten the strain screw all the way down. If you still get misfires, send it back to S&W to check for out-of-spec headspace. Get rid of all aftermarket parts.
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05-05-2024, 01:56 PM
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Quote:
Originally Posted by steelslaver
I have always used a stock mainspring and adjusted the tension screws length so that when tight it is 100% reliable. I used to get all into polishing and smoothing the spring.
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This is the way! That is the proper way to do it. When I attended Smith Armorers School we were taught that. No new parts necessary.
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05-09-2024, 11:13 PM
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Cheap Ammo wont fire all the time with the springs and firing pin combo. If you shoot Federal primers you won't have any problems. I have a 686 with a 3.5 pound double action trigger pull and it fires every round. Hope this helps.
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05-11-2024, 03:21 PM
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FWIW, the TKC pin is shorter than the Apex that’s already in it.
I have a factory spring that I bent very slightly, but it’s not balanced, it has a catch about midway through.
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05-12-2024, 02:28 PM
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Update: I installed a slightly slimmed-down MS and switched back to the original strain screw.
Pull weight averaged 10lbs.
Backed out the screw 1/2 turn and it dropped to an even 9 lbs (my Timney gauge isn’t digital and has 1/4 lb graduations)
I realized the roughness was from the weaker Wolf rebound spring. All is smooth following the adjustment.
Range test coming.
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