I hope you have a huge backstop for that-- or 2 miles of empty land for a 60-degree arc on both the left and right sides of your target.
Bowling pins are round, and if you don't hit them within an inch of the center, your bullet is likely to ricochet or pass through the edge of the wood (and plastic cover) and take off at a wild angle.
I've done a bunch of bowling pin shooting indoors and out, and many indoor ranges have stopped hosting such events due to all the bouncing bullets hitting the walls, lights, ceiling, etc.
A better reactive target is a square block of wood. If the surface you're going to place them on is firm and level, a six-inch tall section of a 2x4 would work. But a six-inch tall section of 4 x 4 fence post is more stable. Bullets that hit near the edge are less likely to exit the wood at a substantial angle.
For steel targets, I like them to swing. So often that means smaller and thinner plates that are just barely enough to stop the bullets I hit them with, while not getting cratered or dented. Shooting very heavy steel just gives you a "clink" and maybe a dark smudge (if the target's been recently repainted), but shooting a 4" round plate only 1/4" think with a carry pistol caliber results in a nice satisfying sudden jerk backward and a swing.
