I ran three boxes of Herter 62 grain HP through my Rock River 2 weeks ago. The only malfunction to speak of was one single failure to lock the bolt open on an empty mag.
Maybe it’s the chromed chamber, I don’t know. I do keep mine meticulously clean and run it nice and wet. I’ve always been cautious using steel case ammo, though. So I keep the majority of my ammo stash brass cased.
Any thoughts?
Probably, the LRHO didn’t work because the last round didn’t have enough power to push the bolt all the way back. Herters (Tula) is notoriously underpowered. Some even suggest running a different buffer/spring combo when using it exclusively.
I had a few problems that could be attributed to the lower power, but not enough that I feel I had to make any changes to the gun. Not for plinking/practice, anyway. Clearing stoppages is good practice, anyway.
I’m sure the chromed chamber made a difference. It reduces the friction and allows the rounds to slide out, even when the chamber is dirty.
I do the same as you. I buy both steel and brass, but the steel goes with me to the range, and the brass goes in the safe.
I would try to fire off a few hundred “Brown Bears” in a lubed gun, rapid fire. Just to know if it is an option for your blaster.