I got a chance to generate some numbers with my two year old Crosman 2100 Classic. When I first bought it I stabilized the barrel with some plumbers tape, replaced the plastic piston with the aluminum one from a Legacy 1000, and painted the trigger gold. Didn’t expect much from it but was pleasantly surprised. From my experience I was thinking the gun would shoot in the mid 600 fps range.1. 707 fps, 8.77 fpe.2. 702 fps, 8.65 fpe.3. 703 fps, 8.67 fpe.4. 700 fps, 8.60 fpe.5. 704 fps, 8.70 fpe.6. 700 fps, 8.60 fpe.7. 704 fps, 8.70 fpe.8. 700 fps, 8.60 fpe.9. 703 fps, 8.67 fpe10. 709 fps, 8.82 fpe.Avg. 703.2 fpsSpread 9.St Dev. 3.0700 fps seems like a sweet spot. It’s making almost nine fpe and I think it will top nine fpe with a light pellet. The consistency of the velocity surprised me too. I haven’t done anything to the internals of this gun but I’m thinking it’s showing some potential. I’m contemplating replacing the transfer port seal with ice maker supply line and maybe some judicious application of heat shrink tubing.Has anyone else chronographed their Crosman 2100?Specifically and older 2100 with the original metal piston? yes a buddy of mine gave me a 1983 2100 he pulled it out of the land fill and used it for years gave it to me this winter i chronyed over this winter and at 10 pumps 7.9cphp it was doing 705 fps and is very accurate although there must be something wearing out in it because if you take it outside from warm house it shoots great after ten minutes out in cold will no longer hold air bring in let warm up its fine again
Not sure if the 2100 ever came w/metal pump rod.....the 766 did.I have read that the aluminum pump rod from the Legacy 1000 can cause some galling in the walls of the pump tube.I need to come up with a delrin bearing to add to a machined pump rod to combat that.... FWIW
yes a buddy of mine gave me a 1983 2100 he pulled it out of the land fill and used it for years gave it to me this winter i chronyed over this winter and at 10 pumps 7.9cphp it was doing 705 fps and is very accurate although there must be something wearing out in it because if you take it outside from warm house it shoots great after ten minutes out in cold will no longer hold air bring in let warm up its fine again
Quote from: bender ville on April 12, 2022, 10:00:45 PMyes a buddy of mine gave me a 1983 2100 he pulled it out of the land fill and used it for years gave it to me this winter i chronyed over this winter and at 10 pumps 7.9cphp it was doing 705 fps and is very accurate although there must be something wearing out in it because if you take it outside from warm house it shoots great after ten minutes out in cold will no longer hold air bring in let warm up its fine again
A lot of people add tape around the barrel, before putting the shroud on. But the major source of play is between the barrel shroud and the receiver, between the pump tube and receiver, and between the pump tube and barrel at the muzzle band. Everything twists and racks. Your POI will shift between sessions. Quick and easy fix: take a thin shim that can easily slide between the barrel and pump tube. Then slide it down towards the receiver, until it wedges, tight. Now the barrel and pump tubes will maintain some pressure against the holes in the receiver to limit play.Then torch the barrel and pump tube gently to preheat them. Then lay a long bead of hot glue on either side where the barrel and pump tube meets. Then stick two lengths or brass tube/rod on either side. But torch the brass tubes, first, before pressing them onto the glue bead. Gotta do all this fast, once you start it. Now the barrel shroud and pump tubes cannot twist and rack.
Got a picture?
The wedge between the pump tube and barrel really tightens things. Wedge close to receiver from a tooth pick piece and touch up sharpie or small piece from the end of a zip tie is not readily noticeable. Flex in the receiver increasing with age is a problem?
The epoxy blob and cellophane sounds like a good idea. Silicone caulking might Work also.