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Thread: Bumping!

  1. #1
    Boolit Master
    JWFilips's Avatar
    Join Date
    Feb 2012
    Northeastern part of Penn's Woods near Slocum Hollow.


    Hello All ,
    Not sure if this is the right place to post, but I have heard the term "Bumping" to enlarge a cast bullet's dia.
    I have about 500 bullets that were sized .358" but I actually need , .359" or larger for my cylinder throats in a pre-27 model S&W .357 mag. These are 18 BHN hardness Is this possible & if so how is it done?
    " Associate with men of good quality, if you esteem your own reputation: for it is better to be alone than in bad company. " George Washington

  2. #2
    Boolit Master

    Reload3006's Avatar
    Join Date
    Nov 2011
    West Plains, Mo.
    yes it can be done basically for a cast bullet you would need a top punch that matched your bullet nose. the inside Diameter of the die would need to be the od your wanting put your bullet in and swage it it will bump up. by squeezing it may be some shorter but will be fatter. Make sure that your bullet is lubed or you will or could loose your lube grooves

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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