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Thread: Benjamin Discovery Rifle

  1. #21
    Boolit Master


    georgerkahn's Avatar
    Join Date
    Sep 2013
    Location
    South of the (Canada) border
    Posts
    1,515
    jmorris -- your "autodrive" is a zillion times better made as well as better looking than what I had put together -- mine using a Hill pump for an AA T200 air rifle. The "problem" I had with mine is my motor was way too fast r.p.m.. I used a 26" bicycle with a 3-speed Sturmey-Archer shifter, turning the pedal-shaft replaced with a large washing-machine pulley driven by the 1725 rpm motor's 1 1/2" pulley's belt. A bolt through the wheel rim had a steel U-piece which held the pump handle -- kind of similar to your driver. The 2nd major challenge -- 1st was the space it took and time to set-up plus monitoring! -- was that, at least for the Hill pump, a pause is really necessary at both the top and bottom of each stroke to make the pump work efficiently, which was not afforded by my attempt. Annd, my pump got rather warm. Congrats and kudos on yours!
    geo

  2. #22
    Boolit Mold
    Join Date
    Jan 2020
    Posts
    2
    Click image for larger version. 

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    I got sick of hand pumping. Kept my Hill MKIII though.
    Iím glad I found this forum. The serious AG forums are airgun only. This allows bows, religion, casting/swaging; main reason I joined. To learn how to cast slugs to perfection for my airgun slug shooters.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check