simple45
.30 Stingray
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Misfires
May 21, 2018 4:04:09 GMT -5
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Post by simple45 on May 21, 2018 4:04:09 GMT -5
After about 150 rounds thru my ruger .500jrh yesterday I started getting a lot of misfires. Light firing pin strikes. Even if I tried to hit the same round again it still wouldn't go off. But I could take all the rounds that wouldn't go off in the ruger and put them in my bfr and bang they would go off. I was using new cut down 500sw starline brass with Winchester primers. the cylinder of the ruger as getting pretty dirty so I'm hoping maybe it just needs a good cleaning and this is causing the light strikes? it's my wilderness protection gun and I'm headed out for a couple weeks of fishing camping and hiking in grizzly country and want to be able to trust it so any help on the misfires would be appreciated. Thankyou
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Post by Ken O'Neill on May 21, 2018 4:57:57 GMT -5
Make sure the gun has a standard Ruger full power mainspring, not a lighter after- market spring.
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simple45
.30 Stingray
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Misfires
May 21, 2018 5:04:27 GMT -5
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Post by simple45 on May 21, 2018 5:04:27 GMT -5
Make sure the gun has a standard Ruger full power mainspring, not a lighter after- market spring. The gun was built by Jack Huntington and I just received it a week ago. whatever springs he uses are what's in the gun.
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Post by rjm52 on May 21, 2018 5:10:24 GMT -5
Are the firing pin strikes on the ones that went off also light...could be the gun have developed a headspace issue?
But as Ken indicated, since this is custom gun a lot of smiths to get a nice trigger pull put an under powdered mainspring in. The gun in my Avatar is a Garry Reeder that started doing the same thing after about 200 rounds...he had cut back the mainspring and it had gone bad. Put in a factory one and the ignition problem went away and the trigger actually felt crisper...16 years and still not one misfire...
Bob
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simple45
.30 Stingray
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Misfires
May 21, 2018 5:19:14 GMT -5
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Post by simple45 on May 21, 2018 5:19:14 GMT -5
Are the firing pin strikes on the ones that went off also light...could be the gun have developed a headspace issue? But as Ken indicated, since this is custom gun a lot of smiths to get a nice trigger pull put an under powdered mainspring in. The gun in my Avatar is a Garry Reeder that started doing the same thing after about 200 rounds...he had cut back the mainspring and it had gone bad. Put in a factory one and the ignition problem went away and the trigger actually felt crisper...16 years and still not one misfire... Bob the strikes on the ones that go off look good...I know the cylinder is pretty dirty and I didn't have any misfires in the first 100 rounds then it got to the point maybe only 2 of 5 rounds go off and even a second hit doesn't set any of them off and the primer strike looks no better on the second try. also with some 80% full power loads(28.0 grains oh 296) the cylinder came unlocked. every round that light strikes went off in my bfr and I had no issues with the same ammo in my bfr.
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simple45
.30 Stingray
Posts: 277
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Misfires
May 21, 2018 5:21:47 GMT -5
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Post by simple45 on May 21, 2018 5:21:47 GMT -5
Are the firing pin strikes on the ones that went off also light...could be the gun have developed a headspace issue? But as Ken indicated, since this is custom gun a lot of smiths to get a nice trigger pull put an under powdered mainspring in. The gun in my Avatar is a Garry Reeder that started doing the same thing after about 200 rounds...he had cut back the mainspring and it had gone bad. Put in a factory one and the ignition problem went away and the trigger actually felt crisper...16 years and still not one misfire... Bob the strikes on the ones that go off look good...I know the cylinder is pretty dirty and I didn't have any misfires in the first 100 rounds then it got to the point maybe only 2 of 5 rounds go off and even a second hit doesn't set any of them off and the primer strike looks no better on the second try. also with some 80% full power loads(28.0 grains oh 296) the cylinder came unlocked. every round that light strikes went off in my bfr and I had no issues with the same ammo in my bfr. Meant to say 28.0 grains of 296 under a 400gr hardcast.
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Misfires
May 21, 2018 5:36:18 GMT -5
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Post by Encore64 on May 21, 2018 5:36:18 GMT -5
Im with Ken on this one. Hammer spring would be first thing I checked.
They are easily changed and extra power ones are available.
I usually give up target type trigger pulls for reliability in my big bores.
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simple45
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Misfires
May 21, 2018 5:50:02 GMT -5
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Post by simple45 on May 21, 2018 5:50:02 GMT -5
Im with Ken on this one. Hammer spring would be first thing I checked. They are easily changed and extra power ones are available. I usually give up target type trigger pulls for reliability in my big bores. I guess I'll order a full power ruger mainspring. not sure I'll have time to play with it before my trip so sadly I might have to leave it behind. as for the trigger pull im sure I'm using a target style pull for accuracy but I never have an issue in my bfr. and had no misfires in the ruger until I was 100 rounds in. Unfortunately not the first issue I've had with this gun.
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Misfires
May 21, 2018 6:49:52 GMT -5
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Post by rangersedge on May 21, 2018 6:49:52 GMT -5
Have you contacted Jack about it yet?
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simple45
.30 Stingray
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Misfires
May 21, 2018 7:12:04 GMT -5
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Post by simple45 on May 21, 2018 7:12:04 GMT -5
Have you contacted Jack about it yet? I had just sent it back to him to fix a loading gate issue and got it back last week. he's out of the shop for a few weeks currently.
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Post by bula on May 21, 2018 8:04:27 GMT -5
Figure the folks pointing to a spring issue more experienced than I. A thought, clean, degrease firing pin area and relube with less, and lighter lube, maybe a synthetic if you like them. I do.
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Steve
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Post by Steve on May 21, 2018 8:36:50 GMT -5
Figure the folks pointing to a spring issue more experienced than I. A thought, clean, degrease firing pin area and relube with less, and lighter lube, maybe a synthetic if you like them. I do. My thought as well. Could be grime build up is slowing down the firing pin. Especially if the pin was lubed with grease. Maybe?
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simple45
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Misfires
May 21, 2018 9:16:49 GMT -5
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Post by simple45 on May 21, 2018 9:16:49 GMT -5
Thankyou to everyone who has provided information and advice on the issue. I absolutely love this gun and it's my perfect backup carry gun for bear protection and is a joy to shoot. like I stated before the cylinder built up a lot of lead and even in the area of where the rim sits into is pretty dirty. I've maybe put 200 rounds total so far and have not cleaned it. I'm going to scrub it down real well and see what happens but I am running out of time to play with it before I leave and I have to be able to trust it. In comparison my bfr fires all rounds and it's definitely went hundreds of rounds before cleaning but that could be a difference of tolerances between the two. I have to send it back to jack to tweak a couple things near the end of June so I really don't want to change springs etc and would just prefer let him handle it if their is an issue besides cleanliness etc. Thanks again to everyone it's great knowing I can access all this knowledge about single actions which are a huge passion in my life.
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Post by lazytcross on May 21, 2018 9:36:34 GMT -5
I wouldn’t clean it just yet. Not because it shouldn’t be cleaned but it might distort the diagnostic process! Could you maybe steal a main spring from something else? Bfr? Also look at firing pin protrusion? Estimate on the headspace?
I have been known to shoot with some pretty dirty cylinders! I usually clean them out when I can’t get the next round in, but I have a hard time seeing where this could ever cause misfires.
Maybe look at your transfer bar. They can be damaged.
(My money is on a wimpy spring)
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simple45
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Misfires
May 21, 2018 9:47:28 GMT -5
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Post by simple45 on May 21, 2018 9:47:28 GMT -5
I wouldn’t clean it just yet. Not because it shouldn’t be cleaned but it might distort the diagnostic process! Could you maybe steal a main spring from something else? Bfr? Also look at firing pin protrusion? Estimate on the headspace? I have two ruger Blackhawks in .45 colt and my bfr .500 JRH. If their the same main springs I could change them out and see what I get. What should my headspace be? I measure it with feeler gauges in between the frame and the case head? Thankyou
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