While individual air rifles will have individual preferences with respect to the pellets that give the tightest groups, in my own hunting, I absoultely cannot ignore the ballistic coeffecient or simply let the chips fall where they may on that score.
50 yards is a long poke with a spring-piston air rifle, let alone one running at 14 to 15 ft/lbs, so I need all of the retained energy that I can get.
That means limiting the choices to pellets with a high ballistic coeffecient, such as JSB Exacts, Crosman Premiers, Crosman Copperhead Points, Beeman FTS, Kodiaks, and the like.
Because of the effect that BC has on trajectory, resistance to wind deflection, and downrange thump, I do not believe that it should be ignored in the interest of nth degree accuracy on paper.
-JP