Lee PrecisionTitan ReloadingWidenersRotoMetals2
Inline FabricationMidSouth Shooters SupplyRepackboxADvertise here

Results 1 to 4 of 4

Thread: PB Gas check a 0.309 bullet for use in 0.311 bore?

  1. #1

    PB Gas check a 0.309 bullet for use in 0.311 bore?

    I have a bunch of cast and powder coated bullets on hand that measure 0.3095. I'm just getting into loading cast for commie 30 cals and I'd like to use what I have. I had the idea of seating a PB gas check with my 0.311 sizing die to have a nice fit at the base of the bullet.

    Has anyone tried this? Success or failure?

  2. #2
    Boolit Buddy

    Join Date
    Mar 2005
    Mogollon Rim, AZ
    I think if you use .3095 bullets in a .311 bore, even with a gas check attached with a .311 die you will get some pretty serious leading due to powder gas blow by. If you are shooting a .311 bore you might add another layer or two of powder coat for a bullet diameter of at least .311/.312.

    Have Fun,


  3. #3
    Boolit Master
    Join Date
    Nov 2006
    If your bore is .311 you need a .312" boolit for the most part, so scrap the pb gas check seating idea, buy a proper 312 or 313" mold cut for the gc and find some proper gas checks to fit it and get a bullet sizer or Lee setup for sizing and installing the gc. If you get the Lee, make sure the die is the right size that they say it is.

  4. #4
    Boolit Master
    Join Date
    Nov 2014
    I know that I use the same gas check on my .311 bullet for the 7.62X39 as my .309 for my .308s.

    No issues
    Last edited by Retumbo; 06-28-2020 at 06:55 PM.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
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