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Berger Hybrid Expansion Test @ 1180 yds

 
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  #1  
Old 06-27-2010, 04:35 PM
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Berger Hybrid Expansion Test @ 1180 yds

Inspired by "RoyinIdaho" I decided to do a little expansion test of the Berger .338 / 300 gr Hybrid my self. So I built this make shift bullet catcher. It all started with a cardboard box 14" thick. I then cut and placed a piece of 1/4" mahogany plywood on the front ( skin / hide ) Then inside a 1 1/2" void filled with moist dirt / compost then 3" screws screwed through the front piece of wood and into a 1/2" piece of plywood ( rib bone) then filled up with 12 more inches of tamped dirt / compost. Get the picture? kinda like (but not really) like, hide, meat, bone and more meat in the boiler room.

Here is a pic.




Then the top was closed and strategically taped with just the right amount of masking tape.




I then returned to home base for the firing of the boolitz. 1180 yards through the scope. I turned the power down for this pic because it was 2:00 pm and the mirage was a bear.




Results in next post.

Jeff
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Old 06-27-2010, 04:47 PM
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Re: Berger Hybrid Expansion Test @ 1180 yds

I had a variable wind left to right. I fired the first shot and seen dust to the right of the target.. Hmmmmm, I checked my dope and decided to fire a second... Dust in the same place... Must be missing the target right and low it looked.... So I held a tad left and raised it up a bit and sent a 3rd, (the high left out of group one) . Dust right behind the target??? Could they be going through at 1180 yards??

Lets go see.

I put a shot of orange paint on the hits so they could be seen in a pic.






YUP! right on through. The two close together exited here. Note, one was far enough right that it barely caught the 1/2" wood inside and a fragment exited side of box.




I feel the other ( the high one) is a great example all the way through. Here is the exit of the high one all by it self.




Inside wood pics next.

Jeff
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Last edited by Broz; 06-27-2010 at 07:40 PM.
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Old 06-27-2010, 04:58 PM
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Re: Berger Hybrid Expansion Test @ 1180 yds

I took this awesome target apart ( yeah... Field dressed it ) Here is a pic of the 1/2" laminated ply wood inside. Remember, the bullet at this point had traveled 1180 yards, punched through 1/4" of plywood, then the card board, then 1 1/2 ~ 2" of dirt and then the 1/2" plywood. You can see the top one had more expansion. Note the knot it hit, and the lower right one just grazed the 1/2" plywood. They all exited with large wound channels. Looks like they do penetrate and expand well even at reduced velocities below 1800 fps.




Stats.

.338 Lapua magnum.
91.5 gr of H-1000, CCI 250 , .Berger 300 Hybrid .015" off the lands
10 Twist Lilja 27.5" long.
Muzzle Velocity = 2785 fps
Impact velocity at 1180 yards = 1786 fps (per exbal)
Impact energy @ 1180 yds = 2124 ft-lb's
Time of flight 1.58 seconds
Elevation -329.8 " (yeah almost 330" / 27 1/2 feet above ine of sight)

Jeff
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Last edited by Broz; 06-27-2010 at 07:42 PM.
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Old 06-27-2010, 05:32 PM
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Re: Berger Hybrid Expansion Test @ 1180 yds

nicely done Broz and thanks for the report. I may have to try some of them badboys in my RUM after I use up all my Sierra's.
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Old 06-27-2010, 07:15 PM
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Re: Berger Hybrid Expansion Test @ 1180 yds

Broz, thanks for doing all that work including posting the pics and the writeup. Nicely done.
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Old 06-27-2010, 09:54 PM
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Re: Berger Hybrid Expansion Test @ 1180 yds

Broz,

Great post and pics. Much info there.

Not only does the masking tape need to be positioned "just right" the tension is also critical.

I can tell your learning somethin' about "boolit catchers" It ain't as simple as one would figure. The idea is to make the shot, retrieve the bullet and shoot again in the same hour

I'm not surprised with the penetration. With the lower velocity there should be less expansion thus more penetration. The mobious amount of energy at that distance even though velocity is lower is one heck of a punch. A 338 cal 300 grain anything with 91.5 gr of pwder behind it is a force to be reckoned with and is usually under estimated (big time)

Patch up the box and turn'er side ways and shoot into the end. Tape your wife's favorite couch pillow to the back end to catch anything going the distance.

Its fun, huh?
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Old 06-28-2010, 07:50 AM
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Re: Berger Hybrid Expansion Test @ 1180 yds

Thanks Guys, I really wanted to recover and see these bullets, but I can see it will take much more to hold them. This did give me the confidence to use them on game now. They sure didn't pencil through.

Roy, I almost made a secomd catcher to place behind this one. I will be looking around here for material for the next design and will give them lots more room to travel. I also might design a few partitions to pass through so I can measure expansion at different distances.

Yup, fun stuff.

Jeff
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