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Author Topic: Berger Hybrids.. Jump or Jam?  (Read 2893 times)

Offline TX65

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    • Beyond556
Berger Hybrids.. Jump or Jam?
« on: 01:58 PM, 11/16/11 »
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  • Lots of new Berger Hybrid bullets out and wanted to get a consensus of opinion on where people are seeing the accuracy when it comes to seating depth to the lands.

    Whether you are shooting a 6 Dasher, 7mm SAUM, 308 Win or 300 WSM, please tell

    Are you Jumping, Jamming or just touching the lands?

    If Jumping or Jamming,, what distance are you finding the accuracy?

    Of course, tell what cartridge and barrel.

    Appreciate you response

    Only hybrid I have tested has been the 30 cal 230 in a 30-338 Win Mag and have been shooting at .001" off the lands, but am going to play with seating it back or forward.

    Arne B
    F-Open 300, 600 & 1000 yards


    Offline NateG

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    Berger Hybrids.. Jump or Jam?
    « Reply #1 on: 02:24 PM, 11/16/11 »
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  • 155 Hybrids in a .308 Palma gun. (2011 Fullbore chamber, if you care)

    I've only tried them jumping .030" on the recommendation of Jerry Tierney, and have seen no need to try anything else. Tried three charge weights, and the middle one was at .110", and 3005fps with a sd under 4. Yeah, that load will do just fine (and has!) for shooting with irons.  ;D

    Offline Steve Blair

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    Berger Hybrids.. Jump or Jam?
    « Reply #2 on: 02:27 PM, 11/16/11 »
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  • I shoot 230's in a .308, 180's in a .284 Shehane and 105's in a 6BR. They are all jumped, .015, .015 and .010, respectively. Performance is excellent.
    Sleepygator


    Offline wboggs

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    Berger Hybrids.. Jump or Jam?
    « Reply #3 on: 03:45 PM, 11/16/11 »
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  • Read your post with interest. Have some 6mm 105s to load in a XC and will start with a .02-.01 jump.
    Thanks for the info.
    Bill

    Offline Outdoorsman

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    Berger Hybrids.. Jump or Jam?
    « Reply #4 on: 04:02 PM, 11/16/11 »
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  • Lots of new Berger Hybrid bullets out and wanted to get a consensus of opinion on where people are seeing the accuracy when it comes to seating depth to the lands.

    With all due respect, the only opinion you need ... is that of your barrel. All the others are meaningless. Each barrel's harmonics are different, regardless of the bullet/cartridge marriage. For the best accuracy, first tune with the bullet/brass/powder/primer combination, then fine tune with neck tension and seating depth. Seating to a consensus does not produce accuracy.

    Offline TX65

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    Berger Hybrids.. Jump or Jam?
    « Reply #5 on: 10:38 AM, 11/17/11 »
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  • Lots of new Berger Hybrid bullets out and wanted to get a consensus of opinion on where people are seeing the accuracy when it comes to seating depth to the lands.

    With all due respect, the only opinion you need ... is that of your barrel. All the others are meaningless. Each barrel's harmonics are different, regardless of the bullet/cartridge marriage. For the best accuracy, first tune with the bullet/brass/powder/primer combination, then fine tune with neck tension and seating depth. Seating to a consensus does not produce accuracy.

    Very true that each barrel has its own opinion, but it does give a bit of insight to what other people are having success with across a range of calibers and cartridges.   

    If the new Hybrid ogive designs do have a pattern of performing within a certain reference position to the lands (.030" to .015" from the lands for example) it does provide information that is valuable and can guide others reducing development time. 

    No different than people seeing a pattern of other bullets like VLD's generating their best accuracy .005" to .015" into the lands and incorporating that knowledge base into their development testing different powders and primers.

     

     



    Arne B
    F-Open 300, 600 & 1000 yards


    Offline TonyR

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    Berger Hybrids.. Jump or Jam?
    « Reply #6 on: 11:12 AM, 11/17/11 »
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  • So far, the 180 7mm Hybrid is the only one I've tried.  It likes to be jumped about 0.010 inches but seems to shoot about the same out to 0.020 inches.  Beyond that, the group starts to open up vertically.
    TonyR

    Consistent long range accuracy is the sum of many things, some large and some small.

    Offline 4xforfun

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    Berger Hybrids.. Jump or Jam?
    « Reply #7 on: 05:02 PM, 11/17/11 »
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  • Good post......I am going to be diving into the hybird zone with 6mm, 7mm, 30 cal and 338's in the very near future....keep it coming!!!!

    The point about all barrels being different is very true, but there will be a trend, like 90% of the VLD shooters jam their bullets to one degree or another.  What will the trend be for the new generation of Berger's ??!!

    "I just gots to know"  (aka Dirty Harry)

    Offline TX65

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      • Beyond556
    Berger Hybrids.. Jump or Jam?
    « Reply #8 on: 09:14 PM, 11/17/11 »
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  • so far it looks like .010" to .020" jump is common for good accuracy with one going as far as .030" jump.

    Very helpful information and while we have only a handful of posts so far, the pattern is consistent that Hybrid's prefer jump to being jammed. 
    Arne B
    F-Open 300, 600 & 1000 yards

    Offline kitsap

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    Berger Hybrids.. Jump or Jam?
    « Reply #9 on: 09:27 PM, 11/17/11 »
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  • Very helpful information and while we have only a handful of posts so far, the pattern is consistent that Hybrid's prefer jump to being jammed.

    Arnie,

    I agree with you about the information being helpful.  The more data points the better.  Thanks for asking the question.

    DougF
    Kitsap

    Offline Busdriver

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    • 308 - 6 Dasher - Straight 284, Love 'em
    Berger Hybrids.. Jump or Jam?
    « Reply #10 on: 09:39 PM, 11/17/11 »
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  • 308 Win, 200 grain hybrid (did testing for Berger) ran best at a .010 jump. At .020 it was pretty close to the same, and I didn't have room to shove it in the case any deeper than that without pushing the bearing surface past the donut area.

    In reality, I think that the bullet would also run well jammed, but being an F-class shooter, I like being able to eject a loaded round without spilling powder. For that reason, I didn't try it with the hybrid - it shot too darn well without having to do that.

    F/TR Mid-range HM, F-Open - It shoots!

    Offline DazzH

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    Berger Hybrids.. Jump or Jam?
    « Reply #11 on: 03:30 AM, 11/18/11 »
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  • I'm part way through a 300 Rem saum build and would like to have the reamer made to suit the new hybrid's, The two I am looking at are the 155 & 168gr. I'm having no luck finding info on dimensions for these. Is anyone able to help me with the OAL, base to ogive and shank length on these bullets.

    Offline dreever

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    Berger Hybrids.. Jump or Jam?
    « Reply #12 on: 05:12 AM, 11/18/11 »
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  • 105 Hybrid in a 6BR .010 jump works for me.

    Danny

    Offline larryk40c

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    Berger Hybrids.. Jump or Jam?
    « Reply #13 on: 06:21 AM, 11/18/11 »
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  • In my dasher the 105 hybrids just touching the lands shoots great for me, have not tryed jumping yet due to the accuracy I'm getting. 28" 8 twist shilen.
              Larry
    Life is short, Enjoy it

    Offline Shynloco

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    Berger Hybrids.. Jump or Jam?
    « Reply #14 on: 07:20 AM, 11/18/11 »
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  • TX65,
       IMO, pay close attention to what Outdoorsman wrote.  I have had excellent results in my .308 from Sierra 168 gr HPBT's for years dating back to the early 80's.  I recently tried (for 4 weeks straight at the range) some 155's using various depth settlings (.010 changes) all the way from SAAMI specs down to touching the lands using three different proven powders (RE15, Varget & 4895)  The results were the worst that rifle has ever shot.   Apparently my barrel simply doesn't like those bullets because as soon as I went back to 168's, she was a target shooter again.  BTW, my barrel twist is 1:10.  Like was said consensus means nothing from rifle to rifle.  Your barrel will tell you all you need to know.  I hope you have better luck than I did should you choose to go with 155's.


     

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