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Thread: 30-40 Krag CB load experts ... Help?

  1. #21
    Boolit Master Outpost75's Avatar
    Join Date
    May 2013
    over the hill, out in the woods and far away

    Measuring the throat diameter is easy. The easiest way to measure a .303 or Krag chamber is to take a factory .38 Special soft-swaged lead, round-nosed bullet, drop it into the chamber, and then use a section of squared off, chamfered and polished 3/8" brass or aluminum rod to pound it into the chamber neck until the drive rod comes to a stop against the shoulder of the chamber. Then just tap the slug back out from the muzzle and measure it with a micrometer. This lets you capture the chamber neck diameter, case mouth transition, and throat diameter, which are all you need to know to order your mold from Accurate or NOE.

    Click image for larger version. 

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    Last edited by Outpost75; Yesterday at 03:43 PM.
    The ENEMY is listening.
    HE wants to know what YOU know.
    Keep it to yourself.

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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