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Posted: 10/26/2008 8:14:48 AM EDT
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I took my RRA 458 to a local dealer to have a Delta ring installed. The gun fired fine before I took it there. Now it will not fully chamber a round. You have to separate the rifle & push REAL hard on the bolt to get it to close. It is around 1/4-1/2 inch shy of closing. It will not extract when it is in this position either. You have to pull really hard to get it to extract as well. I tried 3 types of ammo including the ammo that worked before. I get the same problems with each. I only test fired 3 rounds out of the gun before the work was done. Once fully chambered it fires & extracts fine. |
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Just guessing, I would guess the barrel is not properly seated like they got some shavings or something against the seat, and maybe the barrel is jacked to one side. You dont have any crap on four bolt face do you ?? Maybe grit or some foreign object in the chamber ?? I would say powder or residue, but you have not really shot it that much. One of those would make sense to me. Did they pull the barrel out of the reciever ?? Marty will probably be able to give you advise on this one. Have you given it a though cleaning ?? Edit: Yep the gas tube makes sense too now that I think about it. |
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Again, disassemble the bolt from the carrier, see if the carrier slides over the protruding end of the gas tube by dropping it down into the upper receiver. Or, clean the end of the gas tube in the upper. Take a Sharpie and color it. Drop the bolt & carrier in, see how much of the finish is removed, or if there is obvious signs of interference. |
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If the chamber is the right dimension, which it sounds like it is, since it was working before, and if the cartridges are the same as before, and the chamber is clean, then they should drop right in. I dont know of any way you can suddenly have a tight chamber unless its dirty. More likely its the brass. Are these the same shells you shot before ?? Are there any mark on them when you pull them out. Remove the upper, shove one in by hand, get a wood dowel and knock it out, and see if the brass is marked. |
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