light primer striking problem

[floydthecat]

During dry firing they will do that. Live firing, I can't imagine how you'd be able to see that.

I agree with that. Just trying to grab straws with OP.

[DaveHH]

I wouldn't get on the excitement plan. This is not unusual stuff not particularly hard to fix and your carbine is going to be fine. When you get your bolt tool, be careful when using it, the pawl can be broken if you get too frisky. Many of these guns have not had the bolt taken down and cleaned since Korea or even WW2. People on these forums do things like boil them to clean them as opposed to taking them apart. I would advise buying a couple of new extractors and plungers, you should have spares anyway. A new recoil spring (Not Wolf springs). These things are an absolute riot to shoot, so handy and light yet so deadly.

[donki1967]

Good morning
Here are the bolt pics, regards

[floydthecat]

Good morning
Here are the bolt pics, regards

Some pictures show a rather flat nose on the firing pin to me. Can you post some pictures of fired brass showing the pin-strike?

[donki1967]

Regards

[browningautorifle]

The fired ones show us they went off. The ones that misfire would tell us more.

[DaveHH]

Is it possible to have too much FP protrusion? My fired cases appear to not be as deep a hit and are slightly flattened.

[floydthecat]

Is it possible to have too much FP protrusion? My fired cases appear to not be as deep a hit and are slightly flattened.

I would say that if one is perforating primers it might be a cause for concern. I have one carbine that did perforate Federal primers, but Federal’s are generally known to be one of the softest. I was tempted to shorten a pin a bit, but opted to stay away from Federal’s. I think as long as it’s not perforating, it would be okay.

There is a range of protrusion. Don’t force my old memory to be correct on this, but it’s close. I think like from .045 to .080.

The one I have perforating Federal’s measures .074.

[DaveHH]

Bingo?
I looked up FP protruson in my big Army manual. Min: .048 Max: .065
It also said to remove and replace all plunger springs and plungers.

Consider that the FP was one of the most troublesome parts to manufacture, usually because of poor heat treatment. There are probably a lot of oversized FPs floating around. A lot of spares that we buy have been used before. Why were they removed?

[floydthecat]

Bingo?
I looked up FP protruson in my big Army manual. Min: .048 Max: .065
It also said to remove and replace all plunger springs and plungers.

Consider that the FP was one of the most troublesome parts to manufacture, usually because of poor heat treatment. There are probably a lot of oversized FPs floating around. A lot of spares that we buy have been used before. Why were they removed?

Well…I only missed my guess by half-a-mile on the long end😁. I have been tempted to shorten my pin a bit, but I did that once to a pin some years ago and polished too much off. Wound up throwing it away.

I will mention another possibility. There can be a slight difference in the machining of the bolt channel depth that will cause a variation in pin-protrusion. There could also be a slight variation in how the shoulder on the pin is machined as well. Everything is built to a tolerance and maybe every pin and every bolt can vary enough to alter pin-protrusion with a particular combination. I have pursued my perforating issue by comparing the same firing pin in a few different bolts and protrusion can vary among bolts.

I just do not want to shorten a pin rendering it bolt specific, so I just went to a harder primer.