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Thread: Any benefit to LR primers in 300 BO?

  1. 11-05-2017, 05:13 PM #1
    BoolitSchuuter
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    Question Any benefit to LR primers in 300 BO?

    Was reading some of the threads about forming brass and ran across mention of large primer pocket forming. I recently started forming 300 BO from 5.56 cases and decided to see if I could put a large primer pocket in the brass. Well, I can but would there be any potential ballistic improvement in doing this?Click image for larger version.  Name: 20171105_150940.jpg  Views: 28  Size: 50.3 KB  ID: 207263

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  2. 11-05-2017, 06:01 PM #2
    dragon813gt
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    No, the powder capacity is reduced compared to the parent case. And a large primer is not needed for 223/5.56.
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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