Rob27 wrote:
The original post is not looking for not just a pellet catcher, but rather a safe way to protect a larger area from errant pellets.
I have not tried it but I would think that plywood backing with a couple layers of carpet to prevent ricochet should work. This would also be easy to set up and take down without making holes in walls.
You would be surprised at how loose hanging sheets of thick felt are excellent at catching pellets. No ricochet, very little penetration. Just a few thick felt curtains folded over a coat rack or curtain rod. Works for small caliber, low to medium velocity.
It's simple in theory, but in practice, it's nice to determine your backstop size as reasonable first, before some elaborate setup is made. I have a pellet trap in the workshop barely six inches wide, and behind that is a 12 inch wide wood panel. It's enough for short range workshop use, for chronograph testing.
If it was ten meters / 9 yards away I'd make it two feet wide, any long distance shooting would need bigger, just in case you pull that trigger while settling down with your scope.
You can hit a barn door, and keep your finger off the trigger until you are aiming at the target right?
The mistakes I have made that could have been catastrophic, but luckily still hit the backstop have all been due to errant trigger being so green with guns, but have the Firearm Safety Course haunting me daily when I shoot. Finger off the trigger!!!
No matter how big the backstop is, an errant trigger pull or "bad trigger discipline" is going to land pellets in the ceiling, floor, coffee cup, window or your best friend's favorite shirt. .. etc.
So my advice with regards to big backstops, is trigger discipline drills first and make sure your triggers aren't too light. It's cute to shoot bullseyes with ultra light triggers since things tend to be more accurate, but that same light trigger can ruin your life, especially if it decides to just shoot by itself one day. That being said, outside I would make a semi circle of cinder blocks or stone. Like a wall of sorts. Indoors, it would just be a big box with duct seal in the back and making sure if someone shoots through the nearby wall, that there's nothing alive or explosive on the other side.
You know those dart boards that have the doors? A dartboard cabinet or something similar would be pleasing to the eye mounted on the wall with a big board of plywood for safety. Then you put your pellet catcher target box in the 'cabinet'. That gives you 3 layers of protection.
Just some ideas thrown around.