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Mine was the typical way over gassed. There is or used to be a cottage industry that made gas bushings of various sizes. I tried several sizes and settled on about 0.045". It seemed to eject the Russian stuff ok, and didn't send good brass into the next county. It also reduced the bending load on the barrel due to the gas piston.
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The Mini-14 is severely over gassed by design.
I have a few and use factory and reloads in them while just a basic cleaning every 300 rounds or so.
Bore clean and gas piston is all I do and I don't leave it soaking wet.
After getting tired of searching two countys over for spent brass I made a gas port reduced bushing, and now the rifles drop the brass within 10 feet and cycle everything I put in it.
You can buy a assortment of bushings online if you want to try.
Mine was the typical way over gassed. There is or used to be a cottage industry that made gas bushings of various sizes. I tried several sizes and settled on about 0.045". It seemed to eject the Russian stuff ok, and didn't send good brass into the next county. It also reduced the bending load on the barrel due to the gas piston.
AFAIK, the Mini-14 uses the same OEM gas orifice as does the Mini-30, which orifice is huge, and needlessly subjects the Mini-14 action to undue gas-induced violence. Whether the Mini-30 is also over-gassed is a subject beyond my knowledge, but IIRC, there are reduced-size gas orifices, and adjustable gas blocks for the Mini-30 as well.
The fact is that Ruger has used a very wide, some would say, unnecessarily wide, ID gas orifice on both rifles. The chosen ID is so large that it
guarantees the action working properly with all but squib loads, and in even the coldest temps, where typical ctg propellant loses some energy. Unfortunately, this also ejects the spent case into orbit, and induces some violence into the barreled action. This over-gassing seems, by all accounts, to be detrimental to accuracy, to say nothing about un-necessary pounding of the action, and felt recoil impulse. Remember the old Mini-14 plastic buffers? Still sold. Wonder why...
The user has alternatives, either an adjustable gas block, or an Orifice kit. I bought the kit, and installed the .040" orifice. So far, no problems. I
did make a point of testing my GI-equivalent reloads in below freezing temps, and I had no issues. Other folks, shooting less energetic ammo, might do well to test such ammo in extremely cold temps before settling on a particular gas orifice. Less-than-energetic Milspec rounds might well require a different ID orifice than is suitable for Mil-spec rounds. Do your research!
Site where Orifice kit (directly linked), or adjustable gas block may be obtained:
https://www.ruger-mini-14-firearms.com/Gas-Reduction-Bushing-Kit.phpThese people seem to have some sort of "association" with Ruger, and having bought some of their products, I am quite satisfied with their quality. YMMV
Disclaimer: no financial interest