I used a lathe on this one but used to use a hacksaw and some files to do the same job.Ģ-Lighter spring. I have cut some of the threads off but left more than half for strength. Here is a pic of the front of the valve cap. The lathe was nice for drilling but a vice and drill or drill press were used in the past. I drilled down about 1/4” then polished it inside. But if it matters you can wrap some leather or rubber around the valve so the finish does not get damaged. Like most things in the world it's what's on the inside that counts. Use a small pipe wrench or channel locks on the cap it does not need to look pretty on the outside. But for those of you who want to the maximum power output these steps will help. Just boring the valve cap and changing to a slightly lighter valve spring will get you most of what is available from them. You can get quite a bit more out of the Crosman 22xx valve.
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