A friend asked me to load some 30-06 rounds for his 742. Started with 60 gr of RL-19 in once fired brass from factory loads with 165 gr Core-Lokt bullets. All cases were below max length. Velocity for the 60 gr load was in the low 2600 range, which is pretty low and certainly not indicative of high pressure. As a rough baseline, he had some 180 gr Remington factory loads that we clocked at around 2700. Problem is that after firing, most of the case necks from the reloads had splits, and most of the splits didn't extend to the end of the case mouth...they were in the middle of the neck running lengthwise...strange. The factory loads didn't split but the case necks were somewhat chewed up. I've never owned a Remington semi-auto but did own a BAR in 300 mag and never had cases chewed up or split like that. Needless to say I don't care to reload any more rounds for that rifle. Any 742 buffs out there with a clue?