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Thread: Rifle failing to feed on 75 gr ammo

  1. #21
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    The feed ramp and receiver interface looks bad. The feed ramps are horrendously rough, and the chamber and barrel extension are FILTHY. My guess is that the horrible ramps are not tolerant of OTM bullets... whereas FMJs will make it into battery.
    "You people have too much time on your hands." - scottryan

  2. #22
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    Quote Originally Posted by farmhard View Post
    Mist if I can get a good pic ill post it, there is a spot on the ramps where there is what I would call abnormal wear from the ramp being to steep. also to add the manufacture said at the time of purchase, which was during the panic of 2013 they had trouble sourcing barrel extensions and that it might have not been in spec. its bad that they sent it out that way and its bad that I didn't know more about what a proper feed ramp should look like, but are at least making it right.
    The copper jackets of the bullets are very soft compared to the steel of the barrel & barrel extension. The bore will wear before the barrel extension because of heat & erosion the bore is exposed to. Not saying the feed ramps have no defect, just that it's not due to wear from feeding copper jacketed ammo.

    Before sending your upper back, load a single round in your magazine and perform a lock back check, making sure the bolt catch is fully engaged and not just partially hanging up the carrier. It's possible your rifle is short stroking
    Last edited by MistWolf; 11-21-15 at 12:22.
    INSIDE PLAN OF BOX
    1. ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
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    4. BOOM!
    5. HA-HA!!

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  3. #23
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    Quote Originally Posted by markm View Post
    The feed ramp and receiver interface looks bad. The feed ramps are horrendously rough, and the chamber and barrel extension are FILTHY. My guess is that the horrible ramps are not tolerant of OTM bullets... whereas FMJs will make it into battery.
    I'm with you on this one. Rifle is filthy, and those ramps look like they are completely un-polished with no effort taken at all to remove machine marks.

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