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Thread: .223 after 4000 rounds

  1. #1

    .223 after 4000 rounds

    hi when i first started reloading for my .223 i was getting 3400 fps with a 50 grain vmax now with the same load iam getting 3250 fps, is this because the barrel is getting worn.


  2. #2
    Or the powder getting weaker.
    No honestly powder can vary from lot to lot. That is just one of the reasons that the powder companies update their load data periodically. More likely that you are right in the first place though.
    It's the calibre of the shooter that counts not the calibre of the rifle.

  3. #3
    Or different primers or different volume cases also can have that affect.
    Bore friction can change with age & that could also change velocity.
    I once did a thorough test of a product called Microlon Gun Juice - It involved treating the rifle bore with a "magic" potion. It put a hard glazed finish in there, reduced friction, increased velocity & reduced group size significantly. I was extremely sceptical but it really worked. If anyone wants to see my results pm me with an email address & I'll send a copy of the report I wrote. (It's a word document with pictures - too large to cut & paste on SD).


  4. #4
    Or temperature, or neck tension, or any other number of things. Has the accuracy diminished?~Muir

  5. #5
    Quote Originally Posted by Muir View Post
    Or temperature, or neck tension, or any other number of things. Has the accuracy diminished?~Muir
    yes the groups have opened up from .5 of a inch to .75 at 100y i use to be able to seat the bullet 15 th of the lands but now its 120th if i seat it that far out there it only about 3mm of a 50g vmax in case

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