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Thread: 223 Flat Primers

  1. #21
    Boolit Master

    tomme boy's Avatar
    Join Date
    May 2011
    Location
    Clinton, Iowa
    Posts
    4,616
    CCI SR primers are not meant to be used in 223 or 556 loads as they are meant for the 22 Hornet class of cases. Otherwise 46K psi max. That is why they flatten and pierce. They are thinner than all other primers. Use Win SR and don't worry about any of this.

  2. #22
    Boolit Master
    Join Date
    Jan 2016
    Posts
    580
    GONRA (as mentioned by others above) suggests CCI Military primers (small rifle and large rifle) for all semiautos.

  3. #23
    Boolit Buddy pacomdiver's Avatar
    Join Date
    Nov 2012
    Location
    eastern PA
    Posts
    281
    i load 26g H335, 55fmjbt (both new and gi pulls) and cci primers at 2.245 OAL in mixed brass, for all of mine, my sons 2 and 2 buddys ARs. with the eotech on my 16" olympic, i can hit the 4" steel plate at 100 all day long offhand, the dot almost covers the whole plate

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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