Rough 'N Ready Rob Posted July 19, 2022 Share Posted July 19, 2022 How to lighten hammer springs on a CZ hammer coach shotgun. Thanks Rob Link to comment Share on other sites More sharing options...
Equanimous Phil Posted July 19, 2022 Share Posted July 19, 2022 Link to comment Share on other sites More sharing options...
Roger Rapid Posted July 20, 2022 Share Posted July 20, 2022 External-hammered doubles typically have flat (as opposed to coil) springs bent in a “V” shape. Reducing their tension is rather easy by sanding them on an emory belt sander (as opposed to using a grinding wheel). You need to remove a progressive amount of material from each of the “blades” of the springs - taking a bit more from the ends of the springs rather than an even amount from each bladle - taking more off the free ends than from the “V” end. Keep a bowl of water near by to keep the springs cool. Finish with fine emory so that there no deep scores in the blades that might present a place that is prone to cracking. Also good to slighly round the edges. Most new hammered-double shotguns have very heavy hammers. If you aim for a pull of 30-35 ounces on a 2˝ hammer (2˝ from center of hammer’s screw to top of hammer) they should detonate any primer and you’ll be able to cock both hammers at the same time with one finger or thumb (unless you like to cock the hammers differently). The trick part is getting both hammers to the same pull - the result of a bit of trial and error. Here’s a picture of the inside of a lockplate with thinned springs on a Pedersoli coach gun. (The brass collar on the top left screw sets the final distance of the rebounding hammer.) RR Link to comment Share on other sites More sharing options...
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