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Thread: Drawing back jackets

  1. #1
    Boolit Master
    Join Date
    May 2010
    Location
    central texas
    Posts
    706

    Drawing back jackets

    My question is what temperature is used to draw back new J4 jackets ? In this case drawing back is heat to draw back work hardened jackets but not anneal to dead soft. I can find info where R G Robinett says it is needed when forming boat tail bullets but not what temp he takes the jackets to.

  2. #2
    Boolit Man SSG_Reloader's Avatar
    Join Date
    Jul 2020
    Posts
    77
    How far are you drawing the jackets to? I've drawn from .425 to .395 and also .350 to .305 without any heat and have no issues.

  3. #3
    Boolit Master
    Join Date
    May 2010
    Location
    central texas
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    706
    He is drawing back to a softer state but below anneal soft temperature. No sizing involved other than to swage the boat tail.

  4. #4
    Boolit Buddy
    Join Date
    Jun 2013
    Location
    Tasmania, Australia
    Posts
    142
    It would be a combination of time and heat. I use my kiln at 400 deg Celsius for 15 min to draw them back a little. That is doing 1000 22LR cases at a time though. Then I derim. You will need to experiment a little to see what works with your gear.
    Bill
    The bloke out in the field is always right until proven otherwise.

  5. #5
    Boolit Master
    Join Date
    May 2010
    Location
    central texas
    Posts
    706
    Thanks Bill, If my cyphering is correct that would be aprox 750*F.

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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