I have some opinions about rests, I won the IL state bench rest round ball championship one year with a couple sand bags a rice bag and an old ironing board. There are a couple things to look out for if you have a soft rest of any kind that has spring to it the pressure on the stock will not be the same there for it wil shoot different enlargeing your group. if you dont use a rear sand bag or good subsitute it will cost you in accuracy,One other thing especally with iron sights hold on a line like the bottom edge of a bull[ if you use a 6inch bull at 100yds it will put you 3 inches high which almost always gives max PBR and holding on a line like that gives an exact point of aim. The finer you aim the finer you will shoot. Lee