ammo sensitive Ruger mini thirty
gentlemen: i have a mini thirty,(ruger 7.62x39) it consistantly jams when i use the cheaper ammo. (wolf, golden bear) is there a way I can have someone fix this issue? I'm assuming its because the coating on the ammo jams the reciever. It fires winchester and remington just fine. I don't really want to trade down to an AK or an SKS.and if I can "work" the reciever I wont have to trade up to a Sig or an FNH. any suggestions? Rick
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I don't know what kind of the Russian ammo your using? The new manufactured stuff has a plastic coating over the steel cases that makes it function much better though in my experience. 0 -
I have a Mini 30. It shoots it all without a problem. Are you using the factory magazine or an after market. 0 -
wolf and golden bear was the ammo Iused. thanks! 0 -
factory mags, 5 and 20's... thanks 0 -
Could you clarify what you mean by "jams"?
The Russian military type steel case ammo is supposed to have hard primers to help prevent slam-fires (discharges on bolt closing) with free-floating firing pin guns like the SKS.
The mini-30 was designed to run softer-primered commerical ammo and might not reliably set off the Russian stuff.
If the problem you have is with misfires (ie gun goes "click" not "bang"), then that can potentially be fixed by swapping out a spring in your gun for a stiffer one. See here:
quote:http://www.ruger-mini-14-firearms.com/mini_14_30_accessories.php
Mini 14 30 Extra Power Hammer Spring
** A Must for those choosing to shoot steel cased
Wolf Ammo! Will help eliminate the misfired
rounds caused by hard primers. This spring
will give the hammer more force which in turn
will hit the firing pin harder.
PRICE $13.990 -
If you have not done this, I suggest you field strip the weapon and keep the wood separate from the iron. Then, give the weapon a thorough cleaning, paying special attention to the receiver area and the chamber.
It would pay you to get hold of a special chamber brush for 7.62mm calibers and give the chamber a good going over with acetone to remove any plastic fouling (acetone is unfriendly to most plastics and wood finishes). If the chamber is pitted or significantly fouled, the plastic-coated cases could be going soft and hanging up on the fouling as the weapon attempts to extract them.
This is just a guess on my part and I am not trying to start a rumor or myth here regarding plastic coated Russian ammo. It would only make sense that the plastic coating on the Russian cases was designed withstand the heat and pressure of firing and not melt or go soft, but who knows?
Following that "plastic fouling" line of reasoning, the brass cases would not have that issue as the surface of the brass would not go soft with the heat.
While it does not seem likely, this could also be an issue related to the differences in ammo velocity as it relates to the gas system in your particular weapon. Be sure the weapon's gas systme is clean and functioning properly. Note: it is not a real good idea to dismantle the gas block on the weapon if you can avoid doing so.
Automotive brake cleaner in a spray can (WalMart or auto parts store) is your friend here in cleaning up carbon deposits and other oily, dirty residue, but acetone is best to get off any gunked-on plastic residue. Follow up by spraying on BreakFree CLP to further clean and lubricate the weapon prior to reasembly. Be sure to run a dry patch through the bore and dry out the chamber prior to firing the weapon after this cleaning and lubricating job.
If your weapon feeds brass-cased ammo without problems, it seems unlikely that that the magazines are the cause.
The "fixes" I have describe are easy and inexpensive to do and should be your first step prior to seeking professional assistance from a gunsmith.0 -
Does it jam with any of the ammo made by american manufacturers? If the cases on the ammo you are using are steel, it may be that they do not bounce back like brass this may be causing the jamming.
Edited 03/28/11 13:51 If it will fire and not eject, it may be the chamber (though I doubt it since other ammo fires) and/or the Wolf cases. The Wolf ammo I shoot has steel cases. When fired cases expand. With brass ammo, after the expansion, the brass will contract back a little and make for an easier extraction, the steel not so much.0 -
first off, thankyou for all the responses. It has the ejecting problem. they will fire. All of the brass seem to fire just fine, but the russian made rounds are the ones that cause the jam. I usually use brake cleaner, but I'll try acetone and do a better job cleaning! I tried cleaning it thoughly the first time, however when I was firing it all i did was change ammo and it fired and cycled just fine. so perhaps there may be the firing pin issue as well as plastic build up. I'll try your suggestions gentleman, THANKYOU! 0 -
You also may have a tight chamber. My wife and I have two target 45's and russian ammo will not extract. The other 45's we own run fine with the russian stuff. 0 -
My solution would be to stay away from the Russian crap and reload the quality USA brass. A tight chamber that runs is a good thing. If you shoot enough Russian crap you will have a loose chamber Eventualy. If you decide to reload just make sure to use the right diameter bullet, I don't know if the mini-30 is .308 or .311. That will make a huge difference in accuracy. [;)][8D][:D] 0
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