Posted: 4/10/2005 5:30:19 PM EDT
|
OK, so I went out and shot my DSA para today after reciving the new (4th one) bolt. Before I did, I checked the headspace with a set of Forester gauges. Closes easily on the "GO" gauge, does not close with any amount of pressure on the "NO-GO" gauge. I found a couple of pieces of brass... (that I am POSITIVE are mine), and they look like this:   I rechecked the headspace again when I got home, and it reads the same. Is this unsafe? What causes this, too tight headspace? Thanks. |
|
Sounds like to me the rifle is headspaced perfectly. You have nice ejector marks on the base of the cases. The only thing I see is where the extractor curled the case rim a little. I've seen the same thing on occassion with my FALS. Maybe not quite enough gas piston dwell but I'm not sure about that. I do believe that it comes from the bolt trying to extract the case a little early before the pressure has bled off-HTH, Lee ETA: I do see on looking again that there is a little primer flow back into the firing pin hole. Could be a pressure issue but I'm not sure of cause. What load were you shooting? |
|
I think I have the "pull" on the case shoulder because of a tight chamber. It is a DSA barrel, and when it gets hot, I see the case rim start to have heavy extractor marks. I think it might be because the chamber is tight to begin with, then it gets tighter when hot causing the shoulder to be deformed. Just a guess. |
| It probably is a little tighter chamber if it's one of the DSA bbls. I think the chamber is .308 Match rather than mil dimensions. I wouldn't have expected pressure problems with that though because I thought that military ball was a little milder than commercial .308 loads- |
|
I've never seen that much primer flow on my cases, but I've never shot that type load before either. I mainly shoot port and south african. I would probably wonder if mine looked like that too. Why don't you post your question at the falfiles? There's a lot of experience there- Lee |