6BR, do you like BR-4 or CCI-450 better for heavy bullets

Discussion in '6BR, 6BR Improved & Wildcats' started by 6mmxc, Oct 8, 2018.

  1. 6mmxc

    6mmxc

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    I am currently shooting br-4's with 29.9 grains of Varget and 110's SMK's and 29.5 with 105 hybrids. For those that shoot the heavy bullets out of your BR's what primer do you prefer, BR-2, or 450?
     
  2. sawcarver

    sawcarver Gold $$ Contributor

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    My Dashers prefer cci-450s
     
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  3. jr600yd

    jr600yd Gold $$ Contributor

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    450’s also try Remington 7 1/2’s
     
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  4. FatBoy

    FatBoy

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    I've tried both, 450Ms have a slight edge in my barrels with Varget.
     
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  5. SPJ

    SPJ Silver $$ Contributor

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    I test primers side by side, I believe you could build ammunition around several brands.
    I like both primers you mentioned, I am currently developing a round based on the BR primer but a point may come where I need to have a slight increase in volocity without adding to much powder and go vertical. 450 primers seem to have that little extra kick without a sacrifice to accuracy.
    I'll know more when I learn more.
    Just my take
     
    Last edited: Oct 8, 2018
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  6. mikeinct

    mikeinct

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    phewh...tough call...My gunsmith prefers CCI 450 Sooo...I use that in the new BRX barrel for my wife...I'm still using the BR4 type...in my old barrel...next season we will both switch to the old Wolf brand Mag type..If what u R using works & you can find them, no need to switch types or brands...mike in Ct
     
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  7. Falfan2017

    Falfan2017 Gold $$ Contributor

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    I'm going to try some sellier bellot smalll rifle primers with h4895 side by side with br4 and post the results. Been using cci450 with no varget. Cautiously optimistic about the sb primer. Several tests have shown it ranks at the top in terms of velocity spreads. Also should be able to handle the pressure. I've run it in high pressure 5.56 loads with no problems.
     
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  8. Mozella

    Mozella

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    450's in my 6mm BR Norma with Berger 105's.
     
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  9. Chuckhunter

    Chuckhunter

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    Not trying to be a smart a$$ but what I prefer really doesn't matter. Only what my load & barrel prefers, so I test and listen to what the target tells me. If the targets start lying, I'm gonna take up golf. :)
     
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  10. pat fulghum

    pat fulghum ( ͡° ͜ʖ ͡°) Gold $$ Contributor

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    Try the 450's first and last....
     
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  11. ballisticdaddy

    ballisticdaddy Silver $$ Contributor

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    I have tried Fed 205M, CCI BR-2, CCI 450 and Rem 7.5's but the Fed 205M worked the best in my rifle
     
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  12. Drop Port

    Drop Port

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    There you go, clear as mud. Looks like you will have to work up a load and see what your combo likes.
     
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  13. Rushty

    Rushty Gold $$ Contributor

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    450s have been the primer of choice for me in several barrels in straight BR, Dasher and BRA.. the plain 400s have also shown more promise than the BR-4s in the BRA and Dasher..
     
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  14. chkunz

    chkunz Gold $$ Contributor

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    The only way to know what works best in your rifle and with your loads is to do the test yourself. This takes good bench rest equipment and technique and takes an investment in time, components and barrel life. Most folks will not do this and this is one area that the opinions of others as to what works for them is not worth much to you; they probably did not do the necessary testing either. Hint, three, three-shot groups will not get you the answer. Mother Nature is a bitch.
     
  15. Rushty

    Rushty Gold $$ Contributor

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    ^^^^ This has a lot of merit, you really do need to test in your own personal set up as you really don’t know the extent to which others have gone with there testing and what kind of accuracy they are chasing...And yes Mother Nature can be a bitch...
     
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  16. 6mmxc

    6mmxc

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    But three shot groups are the easiest.
     
  17. 6mmxc

    6mmxc

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    Always has to be one, but that is what makes it fun.
    I agree on the golf.
     
  18. 6mmxc

    6mmxc

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    Thanks everybody.
     
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  19. sidecutter

    sidecutter

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    the br4s, 450s and 205ms very very little difference for me

    varget and 108 target bergers
     
    Last edited: Oct 9, 2018 at 12:13 PM
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  20. dkhunt14

    dkhunt14

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    I think more of it depends on powder used. I see more guys shooting BR4 with Varget and 450 with RE15. Now this is 1000 yard BR, but I get to see a whole bunch of 6MM'S shot. Matt
     
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