Probably
unrelated, but posted in another thread: "The only caveat concerning the Mini-30 is that Ruger seems to make them with firing pins which are just a little too short for 100% reliable ignition of some steel cased ammo. The solution is to go to
Firingpins.com or
ASI and buy a slightly longer firing pin. It may be necessary for user to carefully "adjust" the firing pin protrusion...." AFAIK, Mini-14s (regardless of caliber) do not seem to suffer from this firing pin issue. Firingpins.com/ASI do not offer a replacement firing pin for the Ruger rifle depicted in the vid, AFAIK.
As I said, likely unrelated, but who knows? Maybe Ruger had a "run" of firing pins that were just a "little" short and need to know about it. It would be
helpful if folks having ignition problems with their firearms would specify the exact ammo that runs well, and the exact ammo which has "problems". That might provide a "clue". It
may possible that Ruger has some "unique" firing protrusion spec as "standard" for
most ammo and which fails to reliably ignite "different" ammo. I wonder...?
Or maybe
some owners need to 100% dismantle their bolts and 110% clean them internally. Forgive me if already done, but sometimes crud builds-up at forward end of the inside of the bolt, thus decreasing firing pin protrusion. Again, possibly unrelated, but a Mini owner had ignition problems, sent his rifle back to Ruger, and they replaced the entire bolt assy.
Watched the vid. That is one of the most convoluted bolt dis-assy and re-assy procedures I've seen in a long time, and that says
nothing about "special" tools required. No Expert, but AFAIK, the "RAR" type action was intended to be a lower-cost replacement for the Ruger Mauser-based Mk II action. Maybe the RAR action costs less to make, but perhaps at the "expense" of user-serviceability. Again, no Expert.
Frankly, watching the vid soured me on this type of action. YMMV.