Shooting, whether for hunting, competition or fun, requires consistency. To shoot well consistently, you need to sight in your firearm, meaning you have to make sure the firearm's iron sights or scope are accurate. To do this properly, you need a shooting table. Shooting tables provide a stable, constant surface on which you can rest your firearm to shoot. Shooting tables range from extravagant to simple and easy. Most of all, the tables must be portable. You can build a shooting range table to suit your needs.
Making the table
Mark and cut 1-inch plywood into a 36-by-48-inch piece.
Measure and cut the plywood piece 18 inches across and 24 inches down, so the piece resembles an upside down "L" with the cutout.
Sand the inside of the "L" cutout. You don't want any jagged corners in this area, since this is where you will sit while shooting.
Nail the plywood piece to the three wooden posts, placing each post under each corner of the "L" shape. Use at least four nails per post. You want the table to be sturdy.
Inspect the table to make sure it is level. If the table wobbles or is uneven in any way, sand the bottom of the posts to make them even.
Set up a sturdy chair. This can be a metal folding chair or a heavier wooden chair. Do not use a chair with wheels on the bottom. It is even better if the chair is adjustable, since each individual shooter's height preference will vary.
Place sandbags on top of the table. Pile the sandbags as high as necessary to keep your rifle or pistol steady while seated.
Use a gun clamp or gun rest. Place the clamp on top of the table, using the sandbags to anchor it and prevent it from rocking or wobbling.
Sit in the chair and check your line of sight. Make sure the clamp and sandbags are not angled too low or high. You need a straight and level plane to your target.
Shoot five rounds at the target and adjust as needed. If the angle is too low, add sandbags. If it is too high, take one away.