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The scoop on the Berger 300gr Hybrid

 
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  #1  
Old 05-18-2010, 11:08 PM
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Location: North Idaho
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The scoop on the Berger 300gr Hybrid

Here is what I found testing the new 300 gr Berger Hybrids.

SPECS vs. SIERRA MATCHKING

...........................................SMK .....BERGER

OVERALL LENGTH ........... .1.718” 1.824”

BARING SURFACE ............. .649” .571”

DIAMETER MAX BARING... .3385” .3385

DIAMETER MIN BARING ... .3385” .3381”

BARING SURFACE ES............ .019” .006”

BASE TO FORWARD BARING .897” .891

BOAT TAIL LENGTH ............. .240” .316”

OAL RELATIVE TO LANDS..... .000” +.126”

WEIGHT AVE.................... 300.0 gr 300.2 gr


NOTES:

BERGER 300 GR HYBRID

OAL IN CANYON RIFLE # 0051 - 3.000” W COMP #1 TO LANDS OR 3.920” OAL STANDARD 338 EDGE CHAMBER

HEAD SPACE OF FIRED CASE 3.019” W GAUGE

LOADED TO AN OAL OF 3.000” W COMP # 1
H1000

90.0 GR 2801 FPS
91.0 GR 2812 FPS
92.0 GR 2861 FPS
93.0 GR 2873 FPS FAINT EJECTOR MARK, SHOT WELL
94.0 GR DNS
95.0 GR DNS
96.0 GR DNS


+P TEST RIFLE – OAL to lands 3.268” or OAL of 4.200”, barely in the neck of the case
Loaded: H1000 an OAL w comp # 1 to 3.267”
95.0 gr. 2807 fps
96.0 gr. 2824 fps
97.0 gr. 2849 fps
98.0 gr. 2892 fps
99.0 gr. 2930 fps
100.0 gr. 2969 fps
101.0 gr. 3003 fps faint ejector mark
102.0 gr. 3030 fps visible ejector mark but bolt not sticky

Loaded 101 gr for test, accuracy was horrible 3-4” at 100 yards. ES 12 fps and 3003 ave velocity.
Loaded 96.0 gr and shot 3/8” at 100 yards
Loaded 100 gr and shot < 3/8” with 1-11 twist +P Krieger barrel at 3052 fps
Loaded 101 gr and shot <1/2 moa at 100 yards with + P and 300 SMK’s

Final Notes:

The Berger bullet seems to be a great bullet in terms of accuracy and actually shoots a little faster than a 300 gr SMK in all applications tested (total of 5 rifles).

Bullet design generated less peak chamber pressure and seemed to require slightly more powder to achieve the same velocity as the 300 SMK. At the same relative pressure the Berger shot 30-45 fps faster.

At velocities below 2900 fps twist rates of 1-9, 1-10, 1-11 shot well. At velocities above 2900 fps 1-10 and 1-11 shot well, however the 1-9 twist was just plain nasty. In the 1-9 twist test rifle that shot so poorly at 3003 fps the powder charge was reduced to a level of just under 2900 fps and shot the best groups of the day. It is quite clear that you can twist this bullet too fast at a certain velocity threshold. If I was building a rifle capable of driving the bullet over 3000 I would not go with a faster twist than 1-10 and would lean toward a 1-11 twist.

A note on transonic / super sonic range and twists - for sure the 1-11 will not shoot worth a damn when the bullet go near or into the transonic range, it is possible that no amount of twist will help this. The positive note is that if you drive the bullet 3000 fps that the transonic boundry is around 2700 yards given reasonable atmospheric conditions.

I believe that this bullet has huge potential and I am looking forward to serious long range testing in the future with it.
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Last edited by Shawn Carlock; 05-19-2010 at 07:27 AM.
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  #2  
Old 05-18-2010, 11:34 PM
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Re: The scoop on the Berger 300gr Hybrid

excellent report Shawn, thanks..........
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Old 05-19-2010, 01:39 AM
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Join Date: May 2007
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Re: The scoop on the Berger 300gr Hybrid

Many thanks SC for that. Sounds like it could be a killer bullet !

DUH
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Old 05-19-2010, 08:41 AM
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Join Date: May 2010
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Posts: 46
Re: The scoop on the Berger 300gr Hybrid

Super report there Shawn I think this one will make for good competition against the SMK's.
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Old 05-19-2010, 09:01 AM
B23 B23 is offline
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Re: The scoop on the Berger 300gr Hybrid

Great post!!! Now if I was only smart enough to be able to apply all that information to good use.
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Old 05-19-2010, 09:38 AM
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Location: Arvada, Colorado
Posts: 369
Re: The scoop on the Berger 300gr Hybrid

Shawn, great writeup as usual. It seems your getting some really good velocities with the Hybrid. I am having my gun re-chambered to 338 LAI. The barrel is 30" Lilja w/1-10 twist. Hoping to hit 2900fps with H1000 but won't complain if I get a little more.
I have 250 Bergers just waiting for the rifle now.
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Old 05-19-2010, 10:54 AM
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Re: The scoop on the Berger 300gr Hybrid

Thanks for your research and input, Shawn. Please keep informed with any new info.
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