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More Bullet Performance Tests - The Media

 
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  #1  
Old 09-07-2008, 10:23 AM
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More Bullet Performance Tests - The Media

The Media I selected is working very well.

Pros:
*Inexpensive
*Rapidly reusable.
*Very light until moistened.
*Does not absorb water but gets wet, if that makes sense.
*Can be moistened to any degree desired. (I used a garden moisture meter to maintain consistency)
*24" will stop a 300 SMK impacting at 2175 FPS.
*Environmentally beneficial
*Is a great oil/chemical spill absorbent.
*Will last for years depending upon how much is spilled during use.
*Rinses off hands very easily. (Keep a jug of water handys)
* 1.5 cubic feet is enough for most LR/VLD, velocity for range testing.

Cons:
* Dirty until moistened


Containment:

This is a real problem with rapidly expanding large bullets like the 300 SMK. I screwed a box together that I thought was very solid, which turned out to be the problem.

A 150 Berger mentioned in the Introduction had no affect on the box at all.

A 280 HAT at some unknown velocity opened the box severely.
I then rebuild and reinforced it extensively.
A 300 SMK hit it at 2175 FPS and completely destroyed it.

I spent the next several hours redesigning the whole idea.

The secret is "use no screws whatever". I drew my inspiration from the design of an Elk's rib cage.

The new construction worked very well. I was able to conduct 4 bullet tests in about 45 minutes.

Seeing as how bullet spin is a non-factor, per other threads, I used reduced loads to simulate downrange velocities.

Part 3 will show the effectiveness of the media.

For most applications a 3 foot length of heavy walled plastic pipe will be sufficient. For those that must have the media out towards 1K I have no idea of what to use. Thus I put the media immediately behind the chrono.

Link to Introduction: More Terminal Performance Tests - Introduction
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  #2  
Old 09-07-2008, 05:18 PM
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Re: More Bullet Performance Tests - The Media

Thanks for the efforts Roy, great stuff. However I must say:
Quote:
Originally Posted by royinidaho View Post
Seeing as how bullet spin is a non-factor, per other threads, I used reduced loads to simulate downrange velocities.
I didn't see any evidence offered in any of those threads that negates tests people on other sites and bullet manufacturers have done that show it clearly is a factor.
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  #3  
Old 09-07-2008, 06:24 PM
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Re: More Bullet Performance Tests - The Media

Roy this media sounds like good stuff. Some Questions.

What did you moisten it with? Oil or water? I was under the impression you were going to use used motor oil?

Dirty until moistened???

Is the media close to the density of water or gelatin?

Exactly how did you construct your box?

Seems to me a person could place a box at 1K for 1K testing?
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  #4  
Old 09-07-2008, 06:53 PM
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Re: More Bullet Performance Tests - The Media

kitty litter?
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  #5  
Old 09-07-2008, 07:43 PM
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Re: More Bullet Performance Tests - The Media

Jon A,

I must of misread "the other posts". Typical for me, though.

Someone, maybe you, posted reports from years ago. I concluded from a brief read, that spin made little difference. I'll retract the statement though the results are the results.

Dirty: Conditioning and drying result in a creation of fines or dust. This stuff is designed for treatment of oil/chemical spills which it is very good at. It soaks up 800 times its own weight.

It would be best described by two year old, very dry buffalo/cow chips run through a blender.

However, its the preparation for the oil spill that seems to make it unique for the bullet expansion tests.

I used water. Oil would have been too messy and would be tried only as a last resort.

Density is hard for me to describe. The density will very from where water is 100% covering it resulting in a very loose slurry that isn't much different than water only.

I wet it first, then placed a large garbage bag in the box then scooped the media to fill the box. I pressed it down a bit by hand and added water until only the bottom inch or so was 100% saturated leaving kind of firm yet loose material. Water can be squeezed out of a hand full and be less than 30% moisture.

A better idea would be to use several smaller plastic bags stacked like milk jugs. All bullets went pretty much straight. THe widest deviation was the HAT that drifted to the right about 3" which may be a box misalignment.

The next time you gut a deer dig into the stomach to see what its been eatin'. The media is on that order but then again way different.

As far as hitting the box at 1K, I'm not the guy for that. Even if I could hit it regularly, a 2K hike or drive for each shot gets really burdensome.

I think that this stuff, in a proper container, for the caliber/weight and velocity of the bullet would put a reasonably useable tool in the hands of most LR shooters. Compared to a real animal though it's may well be like having a Oehler vs a Chrony.

From what I'm seeing with so many new bullets becoming available I definitely want to get as good of a feel for terminal characteristics as I do for velocity and accuracy.

Bergers that have been tested closely duplicate published performance.

We have perfromance indication of the WC 338 285 or was it a 265 from Kirby's elk.

Proof of terminal effectiveness of the 7mm WC 200gr was demonstrated on Buffalobob's 964 yd elk.

GG has demonstrated effectiveness of the 225 NAB time and time again.

Many are shooting the 300 SMK and getting dead anmials but further investigation leaves some wondering if they can be trusted in all situations.

LRH shooters are pushing things well beyond what has been generally accepted for years. Remington Core Loks and Winchester Silvertips are some of the best performing bullets for their intended use. However their BC isn't for squat leaving them out as an LRH selection.

Thus the quest continues........
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  #6  
Old 09-07-2008, 08:10 PM
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Re: More Bullet Performance Tests - The Media

Good job Roy. Do the 1k test, it will build character.

JD338
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  #7  
Old 09-07-2008, 10:26 PM
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Re: More Bullet Performance Tests - The Media

Very interesting Roy. The Hat's had a totally different result in your test than mine. Where is that promoter of them anyhow? The deer hunt must surely be over by now. It started on the 18th of August. No reports as of yet from him? Perhaps the results weren't worth showing to us?! I wonder how many does he wounded before he gave up. Oh pessimistic me.
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