610 Strain Screw...

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Hiya... I really love my new 610, but I'm fairly new to wheelies, and wanted some advice from the more-seasoned. I know conventional wisdom says tighten the strain screw all the way down and leave it alone... okay, that's what Ive done. The trigger is still nice anyway, very shootable. But I have noticed that the gun knocks the bejeezus (technical term) out of primers. It leaves some of the deepest strikes I've ever seen. Can the screw be hogged down (another technical term) too tight? What's the procedure for messing with something like this? Thanks.

DanO

 

[KurtC]

1. Deep hits are not an issue unless you are piercing primers, which is dangerous.

2. Make sure you are using factory ammo and original S&W clips before modifying anything.

3. The normal routine is to keep the strain screw tight and make modifications to spring tension by shortening the screw.

4. There are reduced power springs available that keep the screw its original length.

5. The gun is designed so that the firing pin cannot pierce the primer on properly headspaced cartridges (see 1 & 2 above). It the pin is piercing the primers on properly headspaced cartridges, then the gun needs to be returned to S&W for service.

Hope all this helps.

 

[ClarkEMyers]

Just possible new means new to you? Was it modified?

If the revolver is new in the box unmodified ignore my speculations.

If you are fooling with the strain screw on a previously modded gun - then there is some slight possibility that the gun was previously set for a super light pull - not totally unheard of on 610's set for IDPA - and the firing pin protrusion is greater than stock to compensate for a light strike.

The procedure for messing with this is to read "The S&W Revolver: A Shop Manual" Book by Jerry Kuhnhausen et. al..

 

[Tacoma]

I'm guessing it has something to do with the design of the gun that's made to use moon clips. I have a 625 that pounds the snot out of primers too. Never peirced one or misfired. I'm leaving it alone.

 

[Black Snowman]

My 646 hits 'em good and hard with plenty of protrusion. I agree that this is likely intentional in the moon clip guns to maintain ignition reliability with brass and clips that are out of spec "just in case".

When I tried a Wilson Combat reduced hammer spring I got occasional light strikes with CCI primers so I switched back to the full power hammer spring. SA trigger was too light for my tastes with it anyway.

 

[mete]

The strain screw is NOT an adjustment screw ,leave it full length and tight. Check firing pin protrusion, it should be about .060".