AND DIRT, I hope ....25 yd pistol range. Budget: cheap. Figured I would use railroad ties.
This! I would never shoot at just large pieces of wood. Lots of dirt is your best bet. It will absorb and hold the bullets. Wood might just toss some back at you.AND DIRT, I hope ....
Whats your budget and firearms you plan on using? What kind of distances? Most people use railroad ties, dirt/sand, and even sheets of AR500 steel if you want to spend the money. The height and width all depends on what you are wanting to do but in my opinion you can never have too much backstop.