If that is what is printed on your barrel. Most will fire 5.56 x 45. They are not the same.
No.. the Mini 30 is the model which fires that cartridge.
Depends. If you mean the Ruger Mini-14 or Ranch Rifle, yes, you can. It is chambered for .223 and 5.56x45 ammo. If you read the owner's manual (available on the Ruger website) it will tell you that on page 13. The Target Model is ONLY for .223. Of course, the 6.8mm and the Mini-30 use different ammo entirely.
The Ruger Mini-14 Ranch Rifle marked as .223 can safely fire the .223 AND the 5.56 NATO military cartridge. The Ruger Mini-14 TARGET model should only fire .223 ammo- no 5.56 mm
AR15, M16, M4, Ruger Mini 14
It says it can on Ruger's website.
The Ruger Web site says the Mini-14 Ranch Rifle and the Mini-14 Tactical Rifle, can be used with either the .223 or 5.56mm round: Mini-14 Target Rifles ONLY accept .223 Rem. ammunition. 5.56 NATO cannot be used in this model. Probably due to tighter chambering dimensions for accuracy.
The Ranch models, G/B models, and AC556, yes - those have a 5.56 chamber. The target models, no - those have a dedicated .223 Remington chamber.
The mini-mag should still be .22 LR.
Yes, it was. Go to the Ruger website for more information. The military round is the 5.56x45 - while dimensionally similar to the .223 Remington, it is not entirely the same. The standard and Ranch models of the Mini 14 have a 5.56x45 chamber, which can accept both 5.56 and .223 Remington ammo. The Target models, however, have a dedicated .223 Remington chamber, and were not designed to use 5.56x45 military ammo.
Some studies indicate the repeated use (20,000) of steel cased ammo will prematurely wear the barrel on semi auto rifles. The normal user will not see the difference.
You must contact Ruger to avoid voiding the warranty for a correct answer.
The Ruger website, under Customer Service, has a downloadable owners manual for your Mini 14.
You can contact Ruger's customer service to find out.