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Thread: 300 blackout ammo checker

  1. #1
    Boolit Master
    Join Date
    Feb 2007

    300 blackout ammo checker

    pros and cons of various ammo/case gauge checkers. Looking at the TSB ammo checker. any feedback on this one or other brands?
    Last edited by mto7464; 02-09-2020 at 05:06 PM.

  2. #2

    Join Date
    Jun 2013
    NW GA
    Like a case gauge?

    I’ve always used LE Wilson and Dillon gauges. I still check ammo in the chamber I’m gonna be shooting it out of.

  3. #3
    Boolit Master 44magLeo's Avatar
    Join Date
    Dec 2010
    Lebanon, NY
    I have a Lyman for 7,62x54R. I got it because some of the once fired brass I picked up wouldn't chamber without a bit too much effort even after FL sizing. These were a too tight fit in the ammo checker.
    I bought a Lyman Shell Sizer. Made like the Lee whack a mole kits. After pushing the tight case into and out of this die with a bench vise they are an easy drop fit in the ammo checker. Well except for a few that had burrs on the rims.
    I found this by placing the rim end of the case into the checker, some were a snug fit. I felt the rim and found the burrs.
    I have a set of diamond jewelers files. A few strokes on these burrs fixed them right up.
    The cases that were a tight fit in my rifle I marked with a Sharpie all over to see were the tight spots were. At the shoulder and at the base is were I saw the Sharpie color was gone. This was even after the FL sizing.
    Did the same after the pass through the Lyman Shell Sizer. No Color was scuffed off.
    I guess the FL die I have works fine with brass fired in my rifle but not in some other rifle. I guess that means my chamber is a bit on the snug side, not a bad thing to have in an old military rifle. Mine is a Mosin Nagant 91/30 built in 1942. I assume it's all original. The numbers on the receiver, bolt and butt plate match. Seems to shoot well. Need to work with it more. With te open sights I get around 4 inches at 100. Need new eyeglasses, sights a bit blurry.

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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