It is my understanding,after 50+ years of reading American Rifleman that the problem was "single heat treatment" of the steel.I also believe that they were inspected over the years and with bolts replaced by double heat treated ones were deemed serviceable with normal ammo.There is no question that double heat treated and nickel steel is better.The question is whether low number Springfields should be used at all,or simply used with care.Most of the concern came about when thousands of Springfields were being bought from DCM and being converted to 308 Norma,300 Win.,etc.We are mostly finished with this,and I vote for careful use with proper ammo.I would defer to Mike or Joe's opinion,after their considerable study of Springfield Sporters,some of which were made with low number recievers.
Mike
