ds-10-speed
New member
Strain screw shims
That is what I do, especially for rim-fire. I do speed shooting sports like SCSA and need reliable ignition but also a fast rest. I don't like a real light trigger pull.
On S&W 617's I use a 13lb rebound with a stock hammer spring and if I get a slow reset (usually with a new gun) I make a 0.010" shim washer to put under the strain screw. I make them by drilling a hole (size of the thread) in 0.010" SS sheet stock and cut out the small washers (diameter of the screw head) with scissors.
This allows you to keep the strain screw tight and is easily adjustable by adding or taking one out. You can remove them later when the new gun gets broken in, I just leave them if no ignition problem. It only takes 1 or 2 shims (for my guns), each shim = 1/3 turn of the strain screw.
The only thing I will do to lighten the trigger in my S&W's is to put in a slightly lighter rebound spring. I never replace the mainspring for reliability reasons, and I wont drop too low on the rebound spring as to ensure reliable reset.
That is what I do, especially for rim-fire. I do speed shooting sports like SCSA and need reliable ignition but also a fast rest. I don't like a real light trigger pull.
On S&W 617's I use a 13lb rebound with a stock hammer spring and if I get a slow reset (usually with a new gun) I make a 0.010" shim washer to put under the strain screw. I make them by drilling a hole (size of the thread) in 0.010" SS sheet stock and cut out the small washers (diameter of the screw head) with scissors.
This allows you to keep the strain screw tight and is easily adjustable by adding or taking one out. You can remove them later when the new gun gets broken in, I just leave them if no ignition problem. It only takes 1 or 2 shims (for my guns), each shim = 1/3 turn of the strain screw.
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