What are people using as a target? My Impact needs a better option.

I've been shooing a multiple target box that I made. It has a 1/2" Plywood backing, a 1/16" steel plate and duct seal. But I was shooting it the other day and after I found this.
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This is what the target looks like It's the thin one in the front:
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I'm assuming that it is going through the 1/16" steel plate, and making it's way through the 1/2" plywood, shooting at 25 yards.
My Impact is a .22 shooting JSB 18.13 gr pellets. 
I'm just wondering what other people's targets are made of?
Looks like I'll need to ungrade to a 1/4" Steel plate? The Square target in the back has a 1/4" steel plate that is tilted to deflect the pellets downwards.

Here my pellet pusher that is doing the damage. ;)

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Leave the rubber mulch in the plastic bag. I put the bagged mulch into another 2 heavy duty plastic bags, packed/punched it into the bucket to get a flatish front and then duct taped over the exposed bag. Tear the duct tape little longer than the width or height, as it applies, and when applying the tape and push it down along the sides of the bag. I put on a layer of horizontal and a layer of vertical to start and then usually just single layers typically.
 
I use a 30 beer can box that I filled with rubber mulch from Lowes. Cheap duct tape covers the holes when it gets too holey and it works great. It now weighs approx 50lbs from all the lead. I will dump it out one of these days and post the pics....might have some neat looking lead art in side...lol. I think now that it has so much lead in it, it probably does not need the mulch any more? I've been using the same box for over 3 years now.
 
To my thinking and experience, anything solid is going to give way eventually. These guns are capable of putting pellet on pellet and they will make their way through. That is the brilliance of the rubber mulch. It moves around and stops everything.
I put mine in a 12x12x12 box and tape it shut. It is good for 6 or 10 tins before I have to get another cardboard box. Also, somewhere in another thread I show you how to recapture all the lead very easily.

Crusher
 
I use a piece of 8x3 or 8x4 treated Monterey Pine board. I can usually put a couple of tins in each side before I notice any splitting. This wood is soft enough to allow enough penetration to contain a pellet and hard enough to stop any number of .22 pills without them eating their way right through. For my home indoor range of 26 metres, this stuff is ideal for my rifles at 30-45 FPE. After the surface gets a bit splintery or I can see a bit if a split forming, I break it down and retrieve marble-sized chunks of lead that I melt down for fishing sinkers. I always use a solid board or plate behind, just in case. 
 
"toku58"Hey you guys gave me an idea. 
What if I used a rubber sheet as a backing on top of the steel plate? May be 3/8" do you think the pellet can penetrate that? Would that be thick enough to absorb the pellets energy?
Any down side to this idea?......... I use an old mudflap from my dump trailor, it works really well , I think it 3/8 thick maybe a little thicker , I have to measure it ,


 
Had a tree that needed coming down. I don't use wood in my fireplace sooo I put this out at 60 yards in the back yard. It's just a 12" piece of the tree, got about 20 more from the same tree. Guess you could say I'm a little chitzy "cheap"!!!!!!!!!!!!!!

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Then if I am somewhere else with wide open spaces I'll carry my metal targets.

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​These are 3/16" metal targets at 125 yards which is what I would recommend for .25 and .30 calibers They can take the impact with zero damage for years

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"likkitysplyt"Had a tree that needed coming down. I don't use wood in my fireplace sooo I put this out at 60 yards in the back yard. It's just a 12" piece of the tree, got about 20 more from the same tree. Guess you could say I'm a little chitzy "cheap"!!!!!!!!!!!!!!

​These are 3/16" metal targets at 125 yards which is what I would recommend for .25 and .30 calibers They can take the impact with zero damage for years
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Those AR500 steel plates are sort of expensive compared to regular steel plates. But yes! They are ballistic rated.
 
If you wanna make a strong back stop you could use a piece of stainless steel the same thickness and be way stronger but WAY EXPENSIVE 
or you could use a 1/2in thick delrin sheet. They are hard but soft so the delrin doesn't break away. 

I poop a single piece of 1/4in may 8th vut my 25 impact can't shoot though one piece so I know half I would be more than enough.