one of the biggest detractors to good shooting is a heavy or ( worse yet ) unpredicable trigger. inconsistancies in trigger pull allow for erratic shooting and poor groups, which are sometimes blamed on ammunition, bore condition, or even rifle scopes.
in an effort to improve their image, and still avoid lawsuits, remington has chosen to redesign their model 700 trigger. not once, but twice. the newest remington trigger is adjustable, and functions quite well.
with just a little bit of skill and simple tools it is easy to adjust and improve the old model remington m700 or the winchester m70 trigger to allow for a clean and light break. the ruger is more difficult.
if poor shooting is your problem, look to your trigger. if it won't break every single time at a pull weight satisfactory to you, replace it. consider timney, shilen,rifle basix, and jard. if shooting a marlin lever rifle, the excellent wild west guns trigger is hard to beat.
this simple and cost effective "gunsmithing" may show the greatest improvement in your shooting, target or game.