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Thread: Lighter bullet, same charge?

  1. #1
    Boolit Mold
    Join Date
    Mar 2018

    Lighter bullet, same charge?

    Hope this is in the right section.

    I'm pretty certain going with a lighter bullet will not require me to reduce my charge, but wanted to make sure there is nothing I am over looking.

    I was pushing my own cast 135gr TC'S with 5.0gr of BE86. I am out of bullets and bought some "Black Bullets" they are 135gr cast (acording to the ad, my scale has em around 117.5). My same charge should be fine, right? I didn't see 135gr cast listed on Alliant's guide but noticed they reduce charge as weight goes up (the way I have always understood it). So going down 20gr, in bullet weight, shouldn't do anything (leaving the charge the same) except up the velocity a wee bit, right?

  2. #2
    Boolit Master tazman's Avatar
    Join Date
    Jan 2014
    west central Illinois
    Correct. The only time it makes much difference is when you go from cast to jacketed or the other direction.
    When you have a boolit that doesn't have data listed for that specific weight, one of the best suggestions is to use data for the next heavier boolit. This gives you a place to start.
    If you have a chrono and have tested your old boolits, test the new ones and see what changes occur if any.

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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