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Mini 14 Reloading

This is a discussion on Mini 14 Reloading within the Reloading forums, part of the Firearm Forum category; Lots of positve input above. For the most part my difference between loading for a gas gun and bolt gun is that you can go ...


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Old March 25th, 2020, 03:03 PM   #16
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Lots of positve input above. For the most part my difference between loading for a gas gun and bolt gun is that you can go low and high in the bolt gun without the chance of a failure to cycle in a semi. There have been many rounds that the starting charge would not cycle the bolt in my semis, no problem in a bolt gun since their is no gas system to eject and load another round for you. My recent testing with 338 federal did this in my semi. I had a great round as far as accuracy in the minimum charge, however since it would not run my semi, I had no reason to pursue that.

Other difference between the bolt and semi is crimping. I recommend crimping on any semi due to the issue of the bullet being pushed back into the case while feeding or loading from a magazine into the breech. This can cause an unsafe increase In pressure. If your single feeding a bolt gun like I do, you dont have to worry about that so I do not crimp my bolt gun rounds. If your shooting a national match ar with a bobsled you could probably get away without a crimp, but if the action is feeding the rounds from the magazine, I say crimp.
Crimps other purpose which includes bolt guns with thumpers or heavy recoiling rounds is to keep the rounds that are in the magazine bullets from moving when the firearm is fired which also increases pressure. Think of how a bullet puller works same prinicpal. This applies to bolt and semi depending on the recoil of the rounds. Thats just a safe practice.

I would say that 40 to 62 grain will be fine for you. The barrel being a 1n9 thats usually the results I see, except for barrels that are 24" long, they fired better with a heavier bullet like a 75 or 77 due to the extra velocity of the longer barrel. The 16" 1n7 or 1n8 did best with the heavy bullets 75 or 77 grain. They did poor with the lighter bullets.

Keep the trim between 1.750 and 1.760. Your case overall length should be 2.260 max or it will not fit the magazine. Normally i am in the 2.250-2.255 range, lighter bullets may be 2.250. Longer rounds can be used in the single load operation, but not magazine fed. A good practice is to load a round and see how it fits the magazine, push them to the rear and see if the bullet drags on the magazine front. I would load maybe 5 then try them before I did a bulk loading session. That way you wont make mistake and have to pull alot of bullets. Seen a friend do that. He actually followed the specs in the book for 380acp, however they would not fit the magazine, they were too long, but they chambered singly fine. Had to rework the entire lot. Just things i have seen.



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