View Full Version : Impact test photo
JeffinNZ
04-06-2014, 03:18 AM
This photo goes back about ten years but I only dug up yesterday.
Around the time of the test I worked for a company that did warehousing for a bakery product firm and one day I scored some 30-40lb slabs of bakery shortening that was being binned. I used it for impact tests.
The test pictured was at 50m and I compared a subsonic 311008 ex my .32-20 against a .22RF HVHP. I poured a thin plaster mix into the bullet holes to form a cavity cast.
http://img.photobucket.com/albums/v505/JeffinNZ/plaster018_zpsdff7f0fb.jpg (http://smg.photobucket.com/user/JeffinNZ/media/plaster018_zpsdff7f0fb.jpg.html)
The 32-20, even at subsonic, passed right through 15 inches of shortening and embedded itself in a fence post 100m behind the test.
Here is the .22RF test:
http://img.photobucket.com/albums/v505/JeffinNZ/impact019_zps50299988.jpg (http://smg.photobucket.com/user/JeffinNZ/media/impact019_zps50299988.jpg.html)
So in answer to the question of will a FN cast bullet at modest FPS have a decent terminal effect? YES.
sthwestvictoria
04-06-2014, 05:21 AM
Nice work. I believe this was the reason was the switch from 9mm to 40 by the FBI after the 1986 Miami Dunkin-Donut shootout. It was found that the standard issue 9mm would not penetrate the 15 inches of donut fry fat that the perpetrators were wearing that fateful day.
leftiye
04-06-2014, 07:22 AM
Yeah, if the po *** would just avoid the donuts, a lot of grief could be also avoided.:kidding:
Walter Laich
04-09-2014, 02:08 PM
Cool. good visual representation of what happened
Pb2au
04-09-2014, 02:59 PM
Thank you very much for sharing. What a clever idea.
The results are interesting!
Smoke4320
04-09-2014, 03:29 PM
awesome way to show expansion and wound channel
Thanks
badgeredd
04-11-2014, 08:05 AM
I find it interesting that even though there isn't a lot of expansion on the 32 cal bullet, the wound channel is quite impressive...definitely large enough to humanely harvest a deer if one limits his range. It also verifies that one doesn't need a hollow point for a bullet to be effective at moderate velocities.
Edd
Trinidad Bill
04-11-2014, 08:48 AM
Thanks for sharing. Great pictures, great read, and provides insight.
Shiloh
04-11-2014, 11:24 AM
Yeah, if the po *** would just avoid the donuts, a lot of grief could be also avoided.:kidding:
Ya know Leftiye, you're stirring the poo. LOL
Shiloh
35remington
04-11-2014, 09:10 PM
I'd caution against inferring clean killing capability on deer from comparing bread dough wound channels against a 22. That's not much of a yardstick.
The pictures do explain such a bullet's better killing power on the larger small game and pests over a 22, though.
Jeff, thanks for sharing.
Bullshop
04-11-2014, 09:32 PM
Its interesting shooting into various test medias. I remember when our beloved Bruce B was shooting a big gun 416 Rigby or 404 Jefrys or something like that into wet rice. He slightly miscalculated the hydraulic effect.
Anyone remember the results?
357maximum
04-12-2014, 03:39 AM
I find it interesting that even though there isn't a lot of expansion on the 32 cal bullet, the wound channel is quite impressive...definitely large enough to humanely harvest a deer if one limits his range. It also verifies that one doesn't need a hollow point for a bullet to be effective at moderate velocities.
Edd
Having actually killed a deer with a similar boolit/ballistics just 5 months or so ago with stellar results and a full pass through....I could not agree more......it does not take a 30-06 to kill a deer at 50-75 yards. I see cast HP's as a very limited use device and for the most part I see it as a penetration limiter. One that is simply not needed in the deer fields.
btroj
04-12-2014, 06:29 AM
Its interesting shooting into various test medias. I remember when our beloved Bruce B was shooting a big gun 416 Rigby or 404 Jefrys or something like that into wet rice. He slightly miscalculated the hydraulic effect.
Anyone remember the results?
I do believe he pretty well blew the box to pieces.
JeffinNZ
04-12-2014, 04:23 PM
Wow, that's an eye opener. I wouldn't have guessed that the anemic old 32-20 in subsonic form would still have that much momentum after penetrating that stuff.
Neither did I. It was a wake up call when I heard it hit something solid and then worked out it was the fence post 100 yards further on. Went about 1 inch into the pine.
Bullshop
04-12-2014, 07:49 PM
I do believe he pretty well blew the box to pieces.
That was it! Never underestimate the hydraulic effect of any bullet catching media containing water, as in flesh.
Digital Dan
04-12-2014, 10:21 PM
Interesting methodology for illustrating the effect on target media, though I think the comparison is misleading. The .22 obviously expanded, but the .32-20, we don't know. Doubt that it did in a significant fashion. Penetration is largely a function of momentum and RETAINED sectional density. Low velocity RN rimfire bullets will penetrate much more than HVHP for that reason.
MtGun44
04-13-2014, 11:09 AM
Interesting test, and a great way to capture the data for display.
Many folks used .32-20 for deer hunting years ago because they "didn't know
any better" and neither did the deer, kept falling over - as long as the shot
was well placed. The cast shows why this works - quite a lot bigger cavity
than the boolit diameter.
Bill
NVScouter
04-14-2014, 12:20 PM
People that stir the Poo pot should have to lick the spoon...............
Ya know Leftiye, you're stirring the poo. LOL
Shiloh
JeffinNZ
04-14-2014, 06:25 PM
Interesting test, and a great way to capture the data for display.
Many folks used .32-20 for deer hunting years ago because they "didn't know
any better" and neither did the deer, kept falling over - as long as the shot
was well placed. The cast shows why this works - quite a lot bigger cavity
than the boolit diameter.
Bill
That's what I keep saying to folk about the 'Wobbly Bottom Syndrome' with the Cruise Missile 6.5mm bullet. It might wobbly but the recipient was none the wiser.
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