I believe that a good gun and ammo can help make a good shooter. I am a 73 year old fart with aging eyes. My custom built AR-15 has shot 2 1/2 inch groups at 600 yards, and 1 1/8 by 5/8 inch group at 300 yards, using open sights. My 1934 Winchester model 52 shot 3/8 by 1/4 inch group at 100 yards, and 1 3/8 by 1 1/2 inch group at 200 yards yesterday, again with open sights. All groups shot were 10 consecutive shots. The AR has a quarter minute rear sight , with a .035 aperture, and the 52, the original ladder style peep sight, and a Lyman 17a front globe. I think any decent shooter can shoot better with quality equipment. By the way, the AR used  77 GR Sierra Match King hand loads, the 52 used Aguila rifle match ammo. For those who shoot .22 LR, the Aguila ammo uses Eley primed cases, and for the money shoots almost, or as well as Eley. I tried to add pictures, but apparently they were too big.