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Thread: Fire-Forming Ackley case

  1. #1
    Boolit Master
    Join Date
    Mar 2010

    Fire-Forming Ackley case

    Hello, I hope someone can give me some advice...I have a .25 Ackley Krag Improved..full length .30-40 Krag case necked to .25 & body blown out to nearly straight with a 40 deg. shoulder. Working up jacketed loads for determining accuracy benchmark gave perfect formed cases using .257 Roberts start loads & 100gr. Speer spitzers. Having cleaned out all copper from bore for cast bullet loads..not wanting to go thru that again..do you think a 100gr. cast gas-check bullet over 18-20.grs. H4227 would form cases? My concern with cornmeal & Bullseye is that sharp 40 deg. shoulder. Thanks a lot!

  2. #2
    Boolit Master Harter66's Avatar
    Join Date
    Jan 2010
    90 miles North of Texarkana 9 miles from OK in the green hell
    If it reaches 20kpsi it should form fine . I haven't worked with 4227 .... 8-12 gr of Unique should be safe and do the job but check it against Lyman's manual
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  3. #3
    Boolit Bub
    Join Date
    Feb 2010
    I used COW and I think red dot to form 6mm Ackley with no problem I started small with the powder charge and increased until I got a case formed to about 70 -80 percent . If you do in the back yard you may get a visit from the local authorities that could be a problem.

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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