I have been surprised how much it has helped me improve my shooting by plinking with a 17HMR. I have become much more steady and manage the trigger much, much better. I took the 30-06 out last weekend and really saw the improvement. I keep trying to stress form as I shoot the .17HMR. Sometimes it is just fun to pop some off. I have also taken the tip from a great shooter to exercise my forearms which aids steady grip. The hand held spring you squeeze together. This I know has steadied me up and I have less fatigue when holding the gun waiting for the right shot. Hey having fun and getting ready for the real thing. I started shooting the .17HMR by shooting at a .22lr stand with paddles that swing up when you hit them at 50yds. It tolerated the 17gr V-max bullets but the 20gr TNT's put large dents in the metal, (Steel), and the pins holding the paddles fell out. In other words I wrecked it. Now I shoot at empty 12 guage and .410 shell casings at 50 yds. This is great training and great fun in the old sand pit in Northern Minnesota. I am sure a regular 22lr would work just fine and you would wreck less targets.
Buckfever