New 155gr 6.5mm Berger on the horizon?

Discussion in 'Big Stuff -- 6.5mm, 7mm, 30 Cal' started by Grimstod, Aug 18, 2017.

  1. Ledd Slinger

    Ledd Slinger Gold $$ Contributor

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    Yeah but I would trust Berger's claimed BC over Hornady. Berger started with really high BC claims years ago when they were beginning to gain a following. Fast forward to today and you'll find that they put in a lot of time and effort to truly test the BCs of their bullets so they can give the customer factual data that will allow them to calculate their trajectory more accurately. Where they found that their BC claims were a little high, they changed the data to what the testing revealed to be true.

    For example, years ago before Berger had separate target and hunting bullets or anyone used a G7 BC, they claimed the 140gr VLD had a G1 BC of .627. You will now find that they claim the same bullet, the '140gr Hunting VLD' has a G1 BC of .600. From my extensive testing with that bullet since they first hit the market and still using them today, I find that the G1 .600 BC claim is more accurate than the original .627 BC claim.

    It's exciting to say a new bullet has an ultra high BC, but often they are over estimated by other manufacturers for marketing purposes. Nosler is a known perpetrator of this marketing tactic with their outrageous BC claims on the LRAB. Hornady may not be quite as bad as Nosler, but I'd bet their claims of a G1 .697 on the 147gr ELD are a little inflated.
     
    Last edited: Aug 30, 2017
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  2. Archer79

    Archer79

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    Didn't hornady just put some money into a Doppler system to make sure their bc's were accurate...in my limited experience everything seems to jive when punched into a ballistics calculator
     
  3. Grimstod

    Grimstod Web Designer for PremierAccuracy.com Gold $$ Contributor

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    Brian Litz test show that the doper radars are not to accurate. An error by the margin mentioned above is possible due to this.
     
  4. Alex Wheeler

    Alex Wheeler Gold $$ Contributor

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    How much error did he find in dopler? I assume this also effects the labradar.
     
  5. Grimstod

    Grimstod Web Designer for PremierAccuracy.com Gold $$ Contributor

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    I do not remember the numbers but he did say that it was so significant that it made it useless for ballistic calculations.
     
  6. Archer79

    Archer79

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    It'll be nice to have more heavy options in the 6.5... right now the eldms are the only readily available bullet pushing that 150 area
     
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  7. KMG

    KMG

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    Matrix 150 & 160 are quite viable. Kevin
     
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  8. Grimstod

    Grimstod Web Designer for PremierAccuracy.com Gold $$ Contributor

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    You guys keep mentioning these but a google search yields nothing.
     
  9. Steveb

    Steveb

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  10. Ledd Slinger

    Ledd Slinger Gold $$ Contributor

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    BC testing is all about getting the bullet down range a really long ways and measuring that performance. My guess would be that a doppler radar system wouldnt track a small projectile accurately for a very far distance. Doppler can't even predict the weather in the Rocky Mountains ;)

    Look at the 160 gr Matrix Hunting VLD bullet with a claimed G1 BC of .685. So a 147gr ELD weighing 13gr less is going to have a G1 of .697? Maybe, but I doubt it

    Berger and Matrix bullets are born from competition shooters. Nobody puts more rounds downrange with more accurate rifles than competitors do.
     
    Last edited: Aug 30, 2017
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  11. steve_podleski

    steve_podleski

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    Not sure if anyone mentioned it, but Sierra has a 155gr bullet out for the past 20years. It's bc is less than their 142 but you could use its specs in Quickload to get some idea on pressures generated and velocities.
     
  12. 284winner

    284winner Silver $$ Contributor

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    Think that may be the 308 bullet your talking about. Yes Sierra did make a 155 mk but years ago. Discontinued now and yes it wasn't built like the 142smk. I would think if Sierra built one today, it would be superior to the 142. Especially with there TMK design out.
     
  13. IdahoSharpshooter

    IdahoSharpshooter Gold $$ Contributor

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    what twist...?
     
  14. Willie

    Willie Silver $$ Contributor

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    Ten pages of speculation. I'll just wait for the test data to come out. Til then I'll stick with the Matrix 150s & 160s.
     
  15. KMG

    KMG

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    Or he could be thinking of the Lapua 155 Mega in 6.5. It's a traditional soft point with a .377 bc. Probably a good hunting bullet but not what you'd call a long range bullet.
     
  16. Grimstod

    Grimstod Web Designer for PremierAccuracy.com Gold $$ Contributor

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    So I originally estimated you could only get 2650fps with the 47L but looks like 2750 will be the speed you can reach. That taken into account makes it even more appealing. This fella reached 2780 on a 24in barrel. He is using H4350 of course which is yields about 100fps more then Varget will. I think I will have to build a 6.5x47 with a longer throat for this bullet. 21463327_728589090659179_8776411904119841181_n.jpg 21558938_728589080659180_8083907814270924159_n.jpg
     

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    Last edited: Sep 12, 2017
  17. Grimstod

    Grimstod Web Designer for PremierAccuracy.com Gold $$ Contributor

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    Looking at the picture this bullet has the same amount of bearing surface as the 140s. Just a longer noes. So longer throat, maybe just not that much. I am thinking .185 of freebore vs my usual .175. With the 140 .175 still has a lot of bullet in the case.
     
    Last edited: Sep 12, 2017
  18. Ledd Slinger

    Ledd Slinger Gold $$ Contributor

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    I don't run my 140s jammed in the lands anyhow. Usually about a 10 to 20 thou jump. So I might not need a longer throat to try these jammed and 10 thou off
     
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  19. Grimstod

    Grimstod Web Designer for PremierAccuracy.com Gold $$ Contributor

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    Agreed, Dave Kiff tells me he thinks a .200 freebore is best for the 140 Hybrids, so with this bullet having an almost identical amount of bearing surface should be easy to build a 6.5x47 that can shoot both. We shall see where it likes to jump from. H4350 will be a must or something in the burn range.

    Think about this too. Most fellas running 140 use varget and get 2750 and if you can switch to a bullet that has a much higher BC and produces the same muzzle velocity with 41-42gr of H4350 that is a win win. I am excited now and no longer skeptical.
     
  20. JBT

    JBT Gold $$ Contributor

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    The problem I've run into using over 41gr H4350 is compressed loads. I do not like compressed loads. So, I run Viht N550. I will say that H4350 has shot well for me in spite of compression.
     

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