I'll preface this by saying I haven't shot a rifle since December, but made it out to the range today to try out the 521 with its new glass and compare it to my Christensen Arms Ranger at 50 yards with assorted ammo. The 521 is wearing a Leupold Mk 3 HD 4-12, the Christensen a Vortex Diamondback 6-24. The reticle on the Leupold is significantly thicker than the Vortex which may account for some of the difference. Overall they both shot fairly well, there was a wind shifting from 12 O'clock to about 2 O'clock which may account for some of the looser groups, but it is likely the Indian not the arrow in this case. Was shooting with a front rest and rear bags. Eley club looks like it did the best out of the 521, Tenex in the Ranger.