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Posted: 6/12/2007 7:32:37 AM EDT
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Guys, I have a LR-308 with less than 80 rounds down the tube. The rifle is leaving large indentations below the shoulder of the cartdridge upon loading. I sent the upper back to DPMS for repair and they found the barrel was out of specification. They replaced the barrel and fired 20 rounds and sent it back. I got it back the other day and loaded a magazine with 10 rounds. When I pull the charging handle back and release the bolt, it rarely feeds a round correctly. Typically the round will get jammed between the bolt lug and the chamber. I have not fired the rifle since getting it back, however I would expect when I release the charging handle, a round is chambered each and everytime. Does anyone have any experience with this? Your help would be appreciated. http://pg.photos.yahoo.com/ph/noc_miken/album?.dir=/e43are2 |
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Mine did the very same when new. This is not uncommon. First, the magazine is likely to be the major problem. In my case, and my buddies, the LH round would not feed (by hand) from the mag. The LH aft rib (in the mag) was catching on the rim of the brass. This results in the round's aft end going down a bit before it feeds (changing the angle it feeds at a bit). The result is FTF. I suggest using a dremel and a high level of thought, skill and care as you grind and polish the offending areas of the magazine. There were some pics here on this site, but the person doing the mods was a bit heavy handed with the grinder. Remove ONLY what is needed to get both LH and RH rounds to feed perfectly smoothly by hand. I then painted my mag with moly spray lube. Second, the "lips" on the mag are sharp. Then need to be smoothed out and polished. Third, the plastic inside the mag gets stuck or is a bit sticky. fourth, The feed ramps may need polishing. Fifth, The actual area where the round hits to form those 2 dents is very sharp. I modified mine with a dremel so they were rounded off and polished. The round should never hit that area, but if it does, you want it to feed anyway without jamming and denting. If you spend an evening with a dremel, a couple of fine grinding points, and a rubberized polishing wheel and point, you will likely have a perfectly functioning and WAY more accurate target rifle. I know, it is sad that this has to be done to make the LR308 just right, but consider what these things cost. Even if you pay 2.5 times as much, you may still have some of these issues. Put another way, I am very glad I spent the evening getting mine just right. It was worth the time to get the fantastic results I now get. I also got to know the rifle much better, which is always a good thing. cujet |
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