Unfired brass?

Discussion in 'Reloading' started by ka30270, Nov 30, 2019.


Help Support Long Range Hunting by donating:


  1. ka30270

    ka30270 Well-Known Member

    Messages:
    77
    Joined:
    Jan 1, 2008
    Just curious what everyone else does. When you start out with a new batch of brass do you work up a load with the brass as is or do you jam one into the lands and allow a "fire form" to your chamber THEN start load workup?

    Thanks
     
  2. Mikecr

    Mikecr Well-Known Member

    Messages:
    4,910
    Joined:
    Aug 10, 2003
    I do full seating testing while fire forming.
    After ~3rd fire forming, with stable brass and best coarse seating, I move to powder development (ladder). After powder, I tweak seating in it's window for tightest group shaping.
     
    MNbogboy likes this.
  3. okie man

    okie man Well-Known Member

    Messages:
    591
    Joined:
    Dec 21, 2013
    New gun or one you just needed more brass for? Are you looking for the best accuracy or just good enough?
     
  4. okie man

    okie man Well-Known Member

    Messages:
    591
    Joined:
    Dec 21, 2013
    I personally give it a full prep! Size, trim, uniform primer pockets then load with a middle of road charge. Then after a first firing I size and trim and start load development with it!
     
    Toddxusmc likes this.
  5. sturner

    sturner Well-Known Member

    Messages:
    300
    Joined:
    Jun 5, 2014
    True the necks load em up and start working on a load
     
    ctw likes this.
  6. ka30270

    ka30270 Well-Known Member

    Messages:
    77
    Joined:
    Jan 1, 2008
    New X-bolt in 7mm Rem Mag. I usually do a full prep and start load workup but I thought of jamming the lands on 100 pieces of brass with the 7mm. This would allow all the brass to be fire formed off the shoulder instead of the belt BEFORE load workup.
    What do you guys think?
     
  7. sturner

    sturner Well-Known Member

    Messages:
    300
    Joined:
    Jun 5, 2014
    Do you full size your brass
     
  8. ka30270

    ka30270 Well-Known Member

    Messages:
    77
    Joined:
    Jan 1, 2008
    Shoulder bump at most, never FL size unless it's for a semi-auto.
     
  9. sturner

    sturner Well-Known Member

    Messages:
    300
    Joined:
    Jun 5, 2014
    Then that’s the way I would go
    Jam em
     
    ka30270 likes this.
  10. can1010

    can1010 Well-Known Member

    Messages:
    663
    Joined:
    Feb 27, 2012
    new gun just use 20-30 pieces for barrel brake in. then use 20 pieces for load development and then every time you clean your gun fireform a couple as foulers and then a few at the end of your range session and before you know it all your brass is fireformed.
    as far as fireforming new belted cases I use a false shoulder instead of jamming the bullet
     
    ka30270 likes this.
  11. ka30270

    ka30270 Well-Known Member

    Messages:
    77
    Joined:
    Jan 1, 2008
    Yeah, I'll probably do that.
    Thanks
     
  12. ka30270

    ka30270 Well-Known Member

    Messages:
    77
    Joined:
    Jan 1, 2008
    ^^ That's a good idea, Thanks!
     
  13. thatguyshm

    thatguyshm Well-Known Member

    Messages:
    206
    Joined:
    Jul 22, 2013
    I sized up to 30 cal with all my 7mm RM new brass, do the false shoulder method for a slight crush fit. Then I do load dev, with special attention to velocity readings. Write down everything so the next new batch of brass will take less time. Once you have a load, hunt with it. After your brass is formed, load up a few and find your velocity window again, usually have to go up or down a few tenths of a grain of powder. Once you hit your velocity, check group sizes and see if it's changed. Should be good to go at that point.
     
  14. 59FLH

    59FLH Active Member

    Messages:
    37
    Joined:
    Jan 3, 2019
    This, cept I drop in a Hornady min SAAMI case gage to verify FLS in not required. Check and adjust trim length if needed.