Early models https://ruger-docs.s3.amazonaws.com/_manuals/mini14-181-186.pdfI know it has been discussed here before but after searching I can't find the thread.
Does anyone have a Ruger Factory document/reference on 5.56 use in the Mini-14?
If that damaged your rifle, then ship it back to RUGER for them to fix it.FYI:
62grain SS109 5.56 NATO will damage your mini. I learned the hard way after going through about 1200 rounds of the stuff. The tab on the op rod/slide assembly got dented, and began slipping out of the channel on the receiver.
I picked up the new slide assembly recently, now I'm considering the adjustable gas block, to prevent this from happening again. I will probably do it the next time $100 bucks falls in my lap.
Having read through some of these discussions, I believe there is a target Mini 14 that can only use .223, but all other Mini 14s can use either.IIRC 5.56 is thicker at the neck and creates significantly more chamber pressure.
I know for a fact that firing a .223 round in a 5.56 weapon has no ill effect. The converse is also true is that firing a 5.56 (repeatedly) will damage the .223 weapon (over time).
What I don’t know (for sure) is whether the Mini 14 is truly a 5.56 weapon.