223 Rem Muzzle Velocity with ~80 grain Bullets

Discussion in 'Small Stuff--22s, 20s, and 17s' started by _Raining, Jul 5, 2019.

  1. _Raining

    _Raining

    Joined:
    Jun 20, 2018
    Messages:
    115
    I am curious what other people are getting as muzzle velocity when using 80ish gr bullets out of a 223 Rem.

    So:
    What bullet do you shoot?
    What is your barrel length and twist rate (reamer if you know it)?
    What powder and powder charge (if you are comfortable sharing it)?
    What muzzle velocity are you getting?
     
  2. xswanted

    xswanted Gold $$ Contributor

    Joined:
    May 11, 2012
    Messages:
    991
    80 grain SMK
    24” barrel
    8 twist
    IMR 4320
    25.0
    2900

    * I worked up quite carefully to this load. Not recommended for any other rifles.
     
    _Raining and Evlshnngns like this.
  3. Texas10

    Texas10 Gold $$ Contributor

    Joined:
    Dec 10, 2016
    Messages:
    1,355
    Curious what your COAL is with that load. I have some 80SMKs but haven't bothered trying them due to case intrusion. Are you specifically throated for the long bullets?
     
  4. xswanted

    xswanted Gold $$ Contributor

    Joined:
    May 11, 2012
    Messages:
    991
    COAL is 2.460.

    This is in a factory Tikka so I’m not sure what reamer specs are.

    When I started with this load I was at .010 off the rifling so maybe it can be calculated that way.

    The rifle now has 969 rounds on it, all with the same brass and the last time I reloaded I started having primer pockets that were enlarged to the point of throwing the brass out. Roughly 9 firings.
     
  5. watercam

    watercam Gold $$ Contributor

    Joined:
    Mar 28, 2008
    Messages:
    2,570
    Berger 80.5s
    30" custom barrel
    25 gr. Varget loaded to the granual
    Lapua brass
    Tula/CCI 400/Fed. 205M
    Seated .035" off lands of a .223 Match reamer
    2970 fps average. ES-20-ish SD- 10-ish (about the best I can do with a .223)
    Could load hotter but there is no need for a target rifle.
     
    _Raining likes this.
  6. Park ranger

    Park ranger

    Joined:
    Apr 6, 2015
    Messages:
    209
    2750 in service rifle 20” with 24 varget 2.450”
     
    NickB1075 and _Raining like this.
  7. DBLNUT

    DBLNUT

    Joined:
    Aug 14, 2007
    Messages:
    110
    26” M24 taper 1-7.5 Brux
    25.0 of Varget
    80 VLD
    .040 off the lands
    2940fps
    Reamer is a .150 freebore with a 225 freebore diameter.
     
    _Raining likes this.
  8. BlackburnBuccaneer

    BlackburnBuccaneer

    Joined:
    May 31, 2015
    Messages:
    18
    28" 1-7" Bartlein 1.15 for 3" then straight taper to 0.96" at the muzzle chambered with a .150" FB .223 Match reamer.

    25.1-.25.3gr Reload Swiss RS50 - has varied by bullet and over the course of the barrel (2800 rounds now).

    Berger 82gr BT / CCI 450 in the first few hundred rounds of the barrel touching the lands gave in the region of 2960 FPS with very good precision.

    Berger 80gr VLD / CCI BR-4 in the middle of the life (circa 1000 - 1500 rounds) gave 3044 FPS average with excellent accuracy.

    Hornady 80gr ELD-M / CCI 450 at present gives 2984 FPS average. Accuracy is fairly good, but alas for me this bullet throws random elevation fliers once every 10 - 15 rounds when none of the berger bullets I shoot do so despite its attractive price I won't be buying any more.

    Now all that said, my prefered bullet is the Berger 90 VLD at about 2820 FPS - beats any of the 80s in the wind all day long and the accuracy is every bit as good and has given quite a few .308 shooters a fair surprise!
     
    _Raining likes this.
  9. Nightraider

    Nightraider

    Joined:
    Sep 19, 2018
    Messages:
    53
  10. loud_noise

    loud_noise Silver $$ Contributor

    Joined:
    Dec 15, 2016
    Messages:
    111
    I have a Tikka Varmint factory barrel
    1:8 24”
    24.2gn Varget/2208
    -.015 off the lands

    I shoot the 80.5gn Berger FBs and I’m getting around 2740-2750fps
     
    Zero333 likes this.
  11. karrarararararar

    karrarararararar

    Joined:
    Feb 17, 2019
    Messages:
    29
    Mossberg MVP Varmint
    24" 1:9 Twist 5.56 chamber
    80 SMK .020" jump
    26.4 grains Shooter's World Match (same as accurate 2520)
    Starline brass
    CCI 450
    3014 fps avg 10 fps std dev.

    This is a hot load.
    [​IMG]
     
  12. FrankG

    FrankG

    Joined:
    Jul 27, 2006
    Messages:
    481
    80gr Berger
    24.0 Varget
    Fed205M
    -.010 off the lands
    .223 Wylde Chamber
    1-7 twist
    .219” x .224” bore and groove size on the barrel
    26” finish length
    2.430” o.a.l.
    2786fps avg.

    Later, Frank
    Bartlein Barrels
     
    CADDIE5 and _Raining like this.
  13. FrankG

    FrankG

    Joined:
    Jul 27, 2006
    Messages:
    481
    I know guys are running loads with Varget over 24.0gr. and I'll say this when you go past 24gr. in a min. spec. chamber (if that's what you are running) and or with a barrel with a tight bore....your pressures will be running over the max. recommended for the .223 Rem.

    Just because you don't have a flat primer or heavy bolt lift doesn't mean the pressure isn't over the max.

    One of the ammo makers had a local guy shooting his gun with 80gr. MK’s that was losing primer pockets in 3 firings shooting 24something grains of Varget. They tested his ammo and it was mid 60s for pressure and it didn't show any flat primers per say during firing.

    In a pressure test barrel 25.5gr of Varget with a 80gr bullet is approximately 70,000psi.
    SAMMI max is 55,000psi and NATO or 5.56 max is 62,000psi and lugs on M16 bolts the lugs start coming off around 80k psi. It doesn't take that much powder in these small cases to bump the pressures up really fast and or if you are not properly keeping up with the proper bore cleaning that the carbon fouling etc...can drive your pressures up as well.
     
    59f100292, CADDIE5 and LA50SHOOTER like this.

Share This Page