Fletch yeppers....mostly the round not sitting at proper height/angle in the mag....and your feed ramps being to sharp,rough, tolerance stacking ect...BUT the common problem is doofuses assembling them !
but you have an Armalite...so you shouldnt have probs....ive already checked the Armalite website and owners manual...there is nothing mentioned about not shooting softpoints....there are hundreds of thousand of ar 308s and ar15's having no probs with leadpoints if not more Wash