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Posted: 11/27/2006 11:31:34 AM EDT
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I was getting a light primer strike on about every 2nd or 3rd round most of the time. The rifle has about 900 through it. The problem started with commercial ammo after about 150 rounds. My reloads worked consistently until about the 300 round point. Changing the hammer spring to a Wolff spring at the 500 round point helped but didn't fix the problem. Today out of 370 rounds there were only 12 light strikes. Much better than before. Could it be a problem with the bolt closing all the way? Any ideas? Setup: Cav Mk II lower DPMS internals Oly 45 upper |
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Hammer spring installed correctly, hence the legs of the spring on top of the trigger, the closed section on the back of the hammer, and the legs of the spring coming up from the bottom of the wind. Also, are you confirming that you are getting any FP strike at all, and not confusing the loading dimple of the round from the floating FP, and not just the bolt not just fully locking up causing the problem in its self? |
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When changing the spring, I made sure it was in the right way. I'm not positive the old spring was installed correctly. The dimple on the primer is about half the normal strike. The firing pin on the Oly 45 has a spring that keeps it from floating. With the bolt, I'm not sure how to tell in a blowback system if it is going fully into battery. That was my first thought but I couldn't find a problem. |
Did you check to see if you have "floating" debis in the FP channel?? FP have a broken tip?? Just thoughts.
9MM FP is spring loaded (B/C are one and the same), and got a feeling that it is more of a bolt bounce problem with a dirty chamber and the bolt/case not fully returning back to breach to bolt face hold (hammer striking more of the back of the bolt than the FP until it shoves the bolt closed, then too much of the hammer's momentum lost on getting the Bolt forward to get a clean ignition). |
| Oops...sorry, what i meant by channel was area of FP spring. Do you have the "9mm" style buffer in this 45. It is kinda double jointed and has a very large roll pin holding the "head" on the body. These are much heavier than even "H" buffers, and the returning inertia would help with "pushing" bolt closed if that is the problem. |
9mm buffer, And the idea is to prevent the bolt bounce to begin with, since the intial bolt drive has enough force to get the round into/seated in a dirty chamber, but if the bolt does bounce, then it may not have enough force the second time around to seat the round. Also, taking about dirty, when was the last time you pulled the FP and gave it (the parts) and the FP channel a good cleaning? |
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It has a Slash heavy buffer. I took the bolt completely apart and cleaned everything the last two times before taking it to the range. I may have found something. The ejector spring was bent and not riding in the channel on the bottom of the bolt. After bending it back the bolt seems to move easier. |
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