Author Topic: One more penetration test. (Read 5101 times - 1 votes)
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Nomadic Pirate · « **Reply #60 on:** February 01, 2021, 06:46:13 PM »

Stand alone MDF

took 3 shots with the .25, same pellet and same gun as yesterday

blown through

smythsg · « **Reply #61 on:** February 01, 2021, 06:53:33 PM »

Look forward to your results. Hopefully I can get to Lowes tomorrow to pick up a piece of MDF.

smythsg · « **Reply #62 on:** February 01, 2021, 06:58:22 PM »

Wow, you posted results as I was posting a reply...

Now that we know the .25 penetrated all the way through at 20 yards, I will move out to 35 yards and shoot mine with the Condor at 65 fpe. I will be shooting NSA 33.5 gn slugs.

JuryRigger · « **Reply #63 on:** February 01, 2021, 09:01:26 PM »

Dang! A lot to be said for a heavy slug moving slow; 180 FPE and a 200 grainer is what; 600-ish FPS?
Put a whole lotta hurt on whatever it hits; that's for sure.

Watching for edition 2, thanks for the results,
Jesse

Back_Roads · « **Reply #64 on:** February 01, 2021, 11:14:16 PM »

Manny, may I suggest spacing the MDF an inch or so apart from the cardboard stack, that will allow a more fluid flow of the simulated skull materiel and still have a good indication of continued pellet path.
Interesting testing so far BTW !

subscriber · « **Reply #65 on:** February 01, 2021, 11:26:48 PM »

Quote from: Back_Roads on February 01, 2021, 11:14:16 PM

Manny, may I suggest spacing the MDF an inch or so apart from the cardboard stack, that will allow a more fluid flow of the simulated skull materiel and still have a good indication of continued pellet path.

Brilliantly simple and effective suggestion. Could make the spacing just a little more to ensure the MDF divot does not get in the way of the projectile impacting the thin plywood and cardboard medium.

I presume the point of the backing layers is to get some idea of the remaining damage potential. Something that one could measure with a chronograph, if you don't mind risking it

. However, the mangled projectile is best caught, so one can evaluate its shape and remaining weight.

Rallyshark · « **Reply #66 on:** February 02, 2021, 04:02:08 AM »

Good stuff!

Nomadic Pirate · « **Reply #67 on:** February 02, 2021, 11:21:57 AM »

Quote from: subscriber on February 01, 2021, 11:26:48 PM

Quote from: Back_Roads on February 01, 2021, 11:14:16 PM
Manny, may I suggest spacing the MDF an inch or so apart from the cardboard stack, that will allow a more fluid flow of the simulated skull materiel and still have a good indication of continued pellet path.

Brilliantly simple and effective suggestion. Could make the spacing just a little more to ensure the MDF divot does not get in the way of the projectile impacting the thin plywood and cardboard medium.

I presume the point of the backing layers is to get some idea of the remaining damage potential.

Yes, yes and yes
But the 3/4" MDF has proven just to strong to aloud meaningful travel into other layers, I think 1/4" or 3/8" would probably be much better.

I will revert back to quality ply as my face for test targets, it might not have the uniform consistency of MDF but that is also why I usually shoot 2 rounds of each to get the average,.....3/4" quality ply already exceeds the requirement for skull strength.

Nomadic Pirate · « **Reply #68 on:** February 02, 2021, 11:27:17 AM »

What I'm gonna use the MDF from now on is to check the cone produced by the different rounds on a stand alone board with 8-10" behind several layers of cardboard screwed to a 3/4" ply to catch the bullet/pellet.

smythsg · « **Reply #69 on:** February 02, 2021, 10:24:30 PM »

Unfortunately I will not be able to do testing with the 3/4 MDF as both Lowes and Home Depot will only sell the stuff in a 4x8 sheet for just less than $40.00 a sheet. A bit too rich for me to blow a few holes in, so like Manny, I will go back to the ply.

Rallyshark · « **Reply #70 on:** February 02, 2021, 11:24:13 PM »

Quote from: smythsg on February 02, 2021, 10:24:30 PM

Unfortunately I will not be able to do testing with the 3/4 MDF as both Lowes and Home Depot will only sell the stuff in a 4x8 sheet for just less than $40.00 a sheet. A bit too rich for me to blow a few holes in, so like Manny, I will go back to the ply.

They usually have 1/4 sheets at HD at the end of the isle or the next one over. Sometimes they have 12" squares of it too. I just happen to have scraps of it laying around, because audio is one of my other hobbies. MDF is the way to go when building speaker enclosures... I'm going to try and do a test in a few days with my small bores. I just gotta find the time and daylight to try it... I also need to get my .177 slug gun sighted in with the new barrel first. I may not even hit the board at the moment,lol!

subscriber · « **Reply #71 on:** February 02, 2021, 11:38:50 PM »

Quote from: Rallyshark on February 02, 2021, 11:24:13 PM

I also need to get my .177 slug gun sighted in with the new barrel first. I may not even hit the board at the moment,lol!

Looking forward to seeing what your .177 slug gun does on wooden boards!

Rallyshark · « **Reply #72 on:** February 02, 2021, 11:52:04 PM »

Quote from: subscriber on February 02, 2021, 11:38:50 PM

Quote from: Rallyshark on February 02, 2021, 11:24:13 PM
I also need to get my .177 slug gun sighted in with the new barrel first. I may not even hit the board at the moment,lol!

Looking forward to seeing what your .177 slug gun does on wooden boards!

I already know it'll blow right through 3/4 MDF, but it the part after that I'm not sure about

Those little .177 slugs penetrate very well, with all the weight behind that tiny diameter. It'll shoot through it at 35-ish fpe, fwiw. I'll do the test with the .177 shooting around 50 fpe, and the .22 around 70 fpe. I just gotta chop up some cardboard and 1/4" ply... I'll try and do it this weekend, if all goes well.

Nomadic Pirate · « **Reply #73 on:** February 03, 2021, 04:31:03 AM »

Post pictures if you can,....looking forward to see results.

Rallyshark · « **Reply #74 on:** February 03, 2021, 12:53:14 PM »

Will do!

steveoh · « **Reply #75 on:** February 03, 2021, 05:01:06 PM »

Ik Manny, you have me wanting to test the powerhouses I own, .257 Texan, .458 DAQ, and the .58 DAQ. I know the .458 DAQ will punch a hole through a Dodge Dakota brake rotor, but how far will it go through your test materials? Oh the joy of breaking stuff!

JimD · « **Reply #76 on:** February 06, 2021, 12:39:51 PM »

I found a little MDF scrap in my woodshop today and decided to do a little testing. I think it came from a package something was delivered in and had a few staples in it but I didn't hit them with pellets. It is about 3/8 inch thick and I taped three layers together with painters tape. I will include a couple pictures. My Prod, tuned to about 17 fpe with 14.? grain pellets did not make it through the first layer. A 21.14 grain Barracuda dented the second layer some but was still in the first layer. My guess is it might go through if it was not backed. My 25 Avenger, tuned to about 35fpe with JSB Kings went through with King heavies, almost 34 grains, but not with Kings. It was almost through, however, and I am sure it would go through without the other layers backing. The heavies will go through 3/4 plywood. The Kings do not unless I've already shot that area some. They splinter up the back, however.

How much mdf penetration do we need to reliably go through a pig skull?

I was testing point blank so I would need to test at distance to use the results in hunting. I would also turn the regulator up some, I have it at about 1500 psi - so I could go up quite a bit.

Nomadic Pirate · « **Reply #77 on:** February 06, 2021, 01:21:43 PM »

Cool, thanks for posting with pictures.

Not scientific, but I use 3/4" quality Plywood as my cut off for Big Boars skull penetration, from what I've seen of the MDF probably 3/8" would equal 3/4" Ply ?

Rallyshark · « **Reply #78 on:** February 06, 2021, 01:37:45 PM »

Quote from: JimD on February 06, 2021, 12:39:51 PM

I found a little MDF scrap in my woodshop today and decided to do a little testing. I think it came from a package something was delivered in and had a few staples in it but I didn't hit them with pellets. It is about 3/8 inch thick and I taped three layers together with painters tape. I will include a couple pictures. My Prod, tuned to about 17 fpe with 14.? grain pellets did not make it through the first layer. A 21.14 grain Barracuda dented the second layer some but was still in the first layer. My guess is it might go through if it was not backed. My 25 Avenger, tuned to about 35fpe with JSB Kings went through with King heavies, almost 34 grains, but not with Kings. It was almost through, however, and I am sure it would go through without the other layers backing. The heavies will go through 3/4 plywood. The Kings do not unless I've already shot that area some. They splinter up the back, however.

How much mdf penetration do we need to reliably go through a pig skull?

I was testing point blank so I would need to test at distance to use the results in hunting. I would also turn the regulator up some, I have it at about 1500 psi - so I could go up quite a bit.

I'm not the expert, but I can say you'd want quite a bit more power for the job. At 20 yards, those pellets will have started slowing down a good bit, and even more so at 30 yards. You'll definitely want to do the testing at the yardage you plan to shoot at. I'd think you'd want it to punch through that 3/8 MDF easily at distance. Personally, I want my guns to punch through a piece of 3/4" mdf at distance, just to be sure. This is assuming, the accuracy and shot placement are spot on. I'd rather have more than needed, instead of the bare minimum myself.

Nomadic Pirate · « **Reply #79 on:** February 06, 2021, 04:26:10 PM »

This is what I'm gonna do today :

Going to set up side by side stand alone 3/4" MDF and 3/4" Birch Plywood

I'm going to set up several layers of non packed tight but somewhat loose thin cardboard at about 10-12" distance, that should give me an Idea of the drop after passing through the 2 boards and what kind of penetration difference the pellets will have.

Will be shooting the 34gr JSB out my 65 FPE MAX

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One more penetration test.

Author Topic: One more penetration test. (Read 5101 times - 1 votes) )

Nomadic Pirate

Nomadic Pirate

Nomadic Pirate

Nomadic Pirate

Nomadic Pirate

Nomadic Pirate

Author Topic: One more penetration test. (Read 5101 times - 1 votes)
)