Self Healing Rubber

i don't know but ill tell ya go to home depo and look at fatigue matts I double them up and shoot my prod at them for practice works really well

If your using them for your backstop aren't they doing exactly what you want now? Im confused.

I use this. http://www.airgunnation.com/topic/my-rendition-of-a-portable-targetpellet-trap-lots-of-pics/

Got it fsa. I didn't know they were going back hard enough to puncture your target. Maybe a piece of carpet in front of the rubber would stop that or angling the mat in at the bottom. Nice target though. I need to build something similar. Good luck.

Dumpster dive?
Used shrink wrap, like used on pallets full of boxes.
I , think (?) it would work well for what you want.
A feed sack stuffed full will stop most anything - a 9mm or a bolt from a 175lb crossbow and it wont harn the arrow.

Only issue would be , when using it nin a sack when you get a bit of a hole in one spot you just throw it on the ground & stomp on it to even it back out.


John

I go to tje post office and get a box the size of magazines and stack it full of old catalogs and the ex wifes oprah magazines.
This lasts for thousands of rounds and is fairly quiet. I cut cardboard to tape targets to. After its shot out, shake out pellets to melt into bullets.

Hang a piece of carpet behind your target paper. The pellet will pass through it. If it does bounce back, it should have lost enough energy that it will bounce off the backside of the carpet and fall. 
Or, fill it with rubber mulch. Since it's already on wheels the weight shouldn't be as big of a concern. You can also knock the depth of the box down to about 8" (even less if your only shooting 177). 

+1 for the rubber mulch. Quiet and lasts forever. I started out too deep (12") and because of the weight cut it down to around 8". Shooting .177 at 20 fpe and no problems at all. 

"fsa46"

"Dirte"I use this. http://www.airgunnation.com/topic/my-rendition-of-a-portable-targetpellet-trap-lots-of-pics/

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Perry, I know you're shooting the .25 PCPs through it with good results. Have you tried a .177 springer on it and if so, does it go through the tile ?

I'm actually looking for something that will allow the pellet to go through and the solid wood block stops it.

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A .177 shot at about 900fps out of a S510. It does pass through at 50 yards. I can do a test out of my TX200 here in a few days.

Gotta go with the rubber mulch from old tires. I'm told (haven't validated on my own) that a box 6 inches deep, filled with the rubber mulch will stop a .223. I've used the mulch for my .22 Marauder and get one or two inches penetration, so a 6 inch box is really overkill. Put your box together, and keep a roll of duct tape handy. tape over the holes after each session. Should last quite a while.

The rubber does eventually break down from the impacts, but just add more rubber to the top of the box, or get a new box. You can even put the rubber mats behind it at a 45degree angle just in case you don't trust the box completely.

I bought the rubber mulch at Sam's Club, but I believe Home desperate and Lowes both carry as well. Nothing I have has come close to exiting the box.