Accurized 183 Woody

Discussion in 'Mini-14 Forum' started by masterPsmith, Dec 16, 2009.

  1. masterPsmith

    masterPsmith New Member

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    Got another one done this week and it's ready to go back to it's rightfull owner.

    Took it out yesterday for test firing, and sighting. Fired about forty rounds to settle it in and sight it for 50 yards. Once sighted in, I fired three rounds for group @ 50 yards using the bench and no artificial rear support. Ammo used was Winchester white box 5.56, 55gr supplied by the owner. I measured the groups two outer most edges at .341" and subtracted .224" bullet diameter for a group size of .117" for the 3-round group. During testing, I had no vertical stringing or fliers of any kind. All brass were landing approx. 3' to my right and rear. There were no FTF or FTE of any kind. The factory iron sights were used for all testing and target work............................

    Mods done to rifle:

    One of my barrel struts.
    One of my .060 gas port bushings.
    Gas block torqued to proper specs.
    Match trigger job. Trigger breaks clean @ just over 3 pounds.
    Front and rear buffers.


    I welcome any and all questions on accurizing the Mini-14, or any questions you may have about the Mini-14 or the Mini-30 or their histories.

    Below are photos of this rifle and target:
     

    Attached Files:

  2. glenthoughts

    glenthoughts New Member

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  3. masterPsmith

    masterPsmith New Member

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    Yes it is..............

    Jim.........
     
  4. glenthoughts

    glenthoughts New Member

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    He is gonna be stoked...
     
  5. masterPsmith

    masterPsmith New Member

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    He said he was going to send me a scope that he wanted on it, but never did. I will call him tonight or tomorrow night and let him know it's done.
    If you talk to Chuck before I do, show him the thread so he knows what he's getting back.

    Jim..............
     
  6. CA357

    CA357 New Member Supporter

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    Well done, well done. :)
     
  7. glenthoughts

    glenthoughts New Member

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    Done,

    Just called him, he is very happy, will be looking at this post tonight.

    I just talked to him, he is beside himself with joy after seeing this thread. He said the rifle was all over the place when he shot it.
    I am sure more to follow. I figure he and I need to make a trek up to see you for a day of shooting. We shall see.
     
    Last edited: Dec 16, 2009
  8. masterPsmith

    masterPsmith New Member

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    That would be a good way for him to pick it up. Better than shipping.

    Jim............
     
  9. glenthoughts

    glenthoughts New Member

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    How about we show up around noon to 1pm sat? (tomorrow?)

    Is that ok for you Jim?
     
  10. mrm14

    mrm14 Active Member

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    I have a couple of questions about accurizing the mini. I purchased a new 580 series mini-14 last year in .223. So far I've had a tirgger job done (now pulls just a tad over 3#) and I had a bedding job done to it. Both these mods increased the accuracy slightly as it was shooting constant 1-1/4" groups at 100 yards. With these mods it now shoots just at about 1"+ at 100 yards.

    The one thing about the trigger job is that it still has alot of creep and the 2 stage feature is practically nill. I'm somewhat spoiled with Jewell triggers.

    What can be done to eliminate the creep of the trigger and restore a noticable 2 stage feature of this trigger? (I want to take it down to 2#)

    What improvement will a barrel strut give me on this 580 series rifle that already shoots this good? (I feel that the 580 series is quite an improvement over the older 180 series I had in the late 1970's for accuracy)

    Also, I'm about to start dinking with the ammo I reload for it in the areas of clearance of bullet to throat and the shoulder of the brass clearance to the chamber (COAL). I want to "tighten" these clearances up to see if it further improves accuracy. What would be good clearances to start with on this rifle?
     
    Last edited: Dec 18, 2009
  11. masterPsmith

    masterPsmith New Member

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    As far as the two stage trigger on the mini, when the trigger job is done properly and safely, there will be a slight take-up just before let-off. This slight amount of take-up should be buttery smooth and almost not noticable. When the trigger stops after take-up, it should break very clean at around 3 to 3 1/2 pounds with no creep. It should break just like a piece of glass. If it is not that way, it was not done properly.

    As far as increasing the overall length of your loaded rounds to decrease the freebore area before contacting the lands in the rifling, you will run into problems with the longer rounds not fitting in the magazine. You must stay with the recomended maximum COAL or under to fit in the mags...


    Jim..................................
     
  12. mrm14

    mrm14 Active Member

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    I've broken the rules with my reloads on my M1A and am somewhat out of SAMMI specs and it works well with this rifle, and only this specific rifle. And yes, I can't get the tightness of tolerance that I can with a bolt gun, but I can play with these clearances and I've seen it usually help with accuracy. I do keep the ammo within the tolerence that the magazine will accomodate for the M1A. I cant help myself with developing ammo for acccuracy even in a semi auto action rifle. So far so good, I havn't experienced "slam fire" yet with these garand type actions. I dont think that I'll get a tighter bullet to throat clerance with this action due to magazine constraints, but i believe I can get the shoulder of the brass within .004" which I believe should help with "Jump". Not that this will prove to be the most accurate for this action as I have been told some of these semi autos actually are more accurate around .008" or so. I have to experiment.

    What about the strut? Is it worth it for this rifle? The rifle does shoot good now for what it is. I still think ammo is where I need to go next.

    What I'm looking for in this mini is a trigger that has a noticable 2 stage effect as I want to get the trigger pull on the second stage lighter like some of my bolt guns. My M1A has an excellent trigger which has been worked down to just over 2 lbs. pull on the second stage and the 2 stage feature is real noticable. The first stage is still fairly heavy solid "click" when it get it and the second stage is very light and the trigger pull can be a easily controlled squeeze on the second stage. Maby I'm asking too much for what is available.
     
    Last edited: Dec 19, 2009
  13. masterPsmith

    masterPsmith New Member

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    As far as the barrel strut, if you are shooting MOA now, you don't need it. The only reason to fit one now would be if you were vertical stringing when the barrel heats up.

    As far as 2 pounds on the trigger, I feel that is too light to be safe on the Mini. Also some High Power matches allow the use of the Mini-14 and you would not be able to compete with a 2 pound trigger pull per trigger weight rules. Your M1A would not be legal either. But if you do go to a 2 pound pull on your Mini, I suggest you use a smaller gas port bushing (size requirements will vary depending on rifle) and buffers to tone the action down.

    Sounds like you have already achieved good MOA accuracy with your Mini. If you make any more changes, just make sure they are reversible in case it goes the other way.

    Good shootin,
    Jim.........................................
     
  14. mrm14

    mrm14 Active Member

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    Thanks for you're input Jim.
     
  15. glenthoughts

    glenthoughts New Member

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    This is Chuck with his AMAZING Mini 14 just done by Jim.

    [​IMG]


    Another on the bench, Chuck did a 5 shot group of "about" 1 1/4 inch, open sights, 100 yards, if I remember right. I was to busy having fun with my scoped 10/22.

    [​IMG]
     
  16. glenthoughts

    glenthoughts New Member

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    My next rifle will be a Mini 14, and Jim will then do his magic on it.

    I PROMISED my wife a new Mac (photographer she is) after the 10/22 before any more firearms of any kind.

    After i get her the computer, (price a stinkin mac these days sheez) then i will look for a good condition stock used Mini 14. I want it to be box stock so I Jim does not have to deal with wayward experiments on it.

    I am so jealous of Chuck's Mini 14, it is simply amazing...
     
  17. KMO

    KMO New Member

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    .060" Gas Port Bushing?

    I'm just curious to know how masterPsmith arrived at .060" for the ID on the gas port bushing. I've gone with bushings with an ID as small as .040" and the rifle still cycled dependably, and spent brass was still tossing about 6-8 feet. I did have a 187-series, though, that wouldn't cycle until I drilled out the bushing to .051". Funny how these rifles behave differently from one another. Anyway, Jim, is .060" small enough to make much of a difference from the factory ID of .085"?
     
  18. masterPsmith

    masterPsmith New Member

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    KMO,
    One size is not a cure-all for all Mini's. Each rifle is individual in itself, along with the loads being used. When I am working on a Mini and selecting a gas port bushing for it, I usually try three sizes, .060", .050" and .040". I test each size with three different loads and use the one that works best within this test while giving 100% reliability. This testing takes a little range time, but is well worth it without guessing which bushing to use. If needed, I can machine bushings of any size to suite an individual rifle and load. Also, on your question, any reduction in size of the gas port bushing will have an affect on the operation of the action. How much, depends on the individual rifle and the loads being used. Hope this helps.............


    Jim.................
     
    Last edited: Apr 6, 2010