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Posted: 2/14/2008 2:53:36 PM EDT
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I am having an issue shooting wolf out of my Ar. I have a colt upper on a dpms lower. The rifle is 100% with quality brass cased 5.56 but will not cycle cheap wolf. When using wolf i have to manually load each round because the rifle will not cycle the next round. The rifle failed the short stroke test with Wolf but passed with 5.56 Privi M193. With the wolf the carrier rides across the top of round to be chambered. Are there any fixes for this or am i stuck shooting the expensive stuff? I have never had any issues before shooting Wolf ammo out of my previous AR's, could it be possible that i got a lower powered case of Wolf ammo? Shawn |
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Rifle is clean and well lubricated? Wolf is nice for function tests: If it cycles with Wolf it'll cycle with anything. Wolf SHOULD cycle a AR, however. Are you loosing gas at the FSB, around the carrier key, or due to missing or severely worn gas rings? How new is this upper? BSW |
Rifle is clean and lubed. The FSB looks to be good, i have never seen any carbon or anything around the front site itself. The carrier key is torqued and peened. All of the gas rings are there but im not sure how to tell if they are worn out or not. The upper is new but the BCG was out of my previous M4. |
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Standard test for gas rings is: With cam pin out, turn bolt/ bolt carrier assembly bolt down. If the bolt falls out replace the gas rings. New upper shouldn't have any deposits clogging the gas tube... The FSB can be pulled and the barrel gas port diameter checked. However, that's pretty much overkill. BSW |
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Wolf is an underpowered round. Wolf is not forcing the carrier as far back as it needs to go to throw out the spent casing AND strip off the next round from the mag. Your fix options are (A) Dont shoot WOLF (B) Cut a link or 2 off your buffer spring (C) Try and find a lower tension buffer spring (D) Shoot the hell out of your rifle and hope that your spring eventually wears to the point where you can shoot WOLF. ETA: Good Luck |
 Don't start clipping recoils springs!!!!If a rifle has a problem, find it instead band-aiding the rifle by clipping the recoil spring. Have you check the recoil spring for end burs that may be scrapping down the inside of the tube, or a buffer bumper pin that is protruding and catching the spring? Have you checked the back of the trigger and disco for signs of hammer wedging (will be a white line from the tail of the hammer at these locations)? When cleaning the chamber, are you using a chamber brush? Also, are you removing all the copper solvent onces the chamber and bore have been cleaned, and lubing all the bearing areas of the upper (including the buffer and spring) with CLP (read on the wet side for break in)? |
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With the exception of one Colt M-4 type barrel that was undersized gas ported to be used with suppressors/Heaver grain bullets, Colt 5.56 barrels/upper will eat anything. The problem lies in his lower, non-colt parts, or is not he cleaning and lubing the rifle correctly. Trust me, too many time have I repaired new problem rifle at the range with nothing more than a can of BreakfreeCLP. |
BreakfreeCLP is not grease, it is a fluid that contains a two lubing agents (both in wet and dry forms), and a solvent cleaner. Hit up Walmart or any other firearm type stores and buy a 16oz spray can of it. For the chamber and bore, you will use a copper solvent, but for the rest of the rifle to both clean and lube, you will use CLP. Also as stated, once the chamber and bore have been cleaned, remove any traces of such. Hoppes and CLP mixes into a gooey mess!!! |
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I just bought a brand new Bushmaster 20inch and am having the same problem. It is a high capacity bolt action rifle. Sometimes I'd get lucky and it would actually chamber a round, not a lot though. A few rounds were damned hard to get out of the chamber, I had to really pull to get the fired cartridge out. I am going to check the buffer spring tonight and clean her up. I only put 100 rounds through it, might as well give it another 100 and see what happens. |
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Update. I went out this past weekend and shot 60 rounds of wolf, no failures of any kind except the bolt would not hold open after the last round. I cleaned the bore/ barrel with a bore brush and cleaning rod, cleaned everything and oiled the carrier. It is still short stroking but at least it is feeding and firing. I believe i am going to get a rebuild kit for the bolt and see if its worn rings causing the issue. When the bolt is in the carrier and all other parts are removed, the bolt turns almost by itself and i can feel a little play. Maybe the rings are worn to the point of causing the issue? |
This is the case with all my bolt/carriers both new and old. The gas rings sorta "suspend" the bolt in the carrier, allowing you to rotate it very easily. |
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