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847 Posts
Hello Enzyme,
99% of Ruger MK II probs are simple. A gummy extractor spring plunger will keep the bolt face off the barrel. To test this, chamber a fired case and release the bolt. Observe the bolt and pull trigger. Did bolt move fwd? If so, you've isolated the prob area and the search begins.
Step 1: Remove upper rcvr and bolt. Tear down and solvent (clutch & brake disk cleaner) wash same. Ruger's preservative coating (cosmoline) is not a lubricant by any stretch of the imagination.
Step 2: Repeat step 1 on all magazines.
Step 3: Clean bolt and barrel face.
Step 4: Inspect barrel chamber for crud (a fired case should push in will very little resistance)
WARNING: Do not alter the barrel chamber unless you know what you're doing.
Step 5: Inspect feed ramp for burrs or nicks, polish (cratex or 600 sandpaper) to high sheen.
Step 6: If you haven't figured it out by now. Look up a gunsmith by the name of Alan Tanaka. He's in Gardena on Hobart St, not too far from you. Don't have his number, will PM you if I find it. His forte is world class PPC/Bianchi revolvers and carry 1911's.
BTW: TRW GC has a monthly Tuesday nite match on Harbor Police Range. Good group of shooters and very safety conscious (well, as safe as engineers can . . . never mind)
99% of Ruger MK II probs are simple. A gummy extractor spring plunger will keep the bolt face off the barrel. To test this, chamber a fired case and release the bolt. Observe the bolt and pull trigger. Did bolt move fwd? If so, you've isolated the prob area and the search begins.
Step 1: Remove upper rcvr and bolt. Tear down and solvent (clutch & brake disk cleaner) wash same. Ruger's preservative coating (cosmoline) is not a lubricant by any stretch of the imagination.
Step 2: Repeat step 1 on all magazines.
Step 3: Clean bolt and barrel face.
Step 4: Inspect barrel chamber for crud (a fired case should push in will very little resistance)
WARNING: Do not alter the barrel chamber unless you know what you're doing.
Step 5: Inspect feed ramp for burrs or nicks, polish (cratex or 600 sandpaper) to high sheen.
Step 6: If you haven't figured it out by now. Look up a gunsmith by the name of Alan Tanaka. He's in Gardena on Hobart St, not too far from you. Don't have his number, will PM you if I find it. His forte is world class PPC/Bianchi revolvers and carry 1911's.
BTW: TRW GC has a monthly Tuesday nite match on Harbor Police Range. Good group of shooters and very safety conscious (well, as safe as engineers can . . . never mind)
