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Posted: 9/18/2011 1:58:43 PM EDT
 well took my brand new single shot bmg to the range today for the first time loaded a round of of new American eagle xm33 660 grain into the chamber bolt was nice and smooth when closing after firing the bolt will not extract the spent round got it open and lubed the bolt real good and the same thing happens again cannot open the bolt tried some lakecity ammo and the same results,rounds are clean,chambered new round and extracts fine unfired,cant think what i'm missing feels like its in the bolt and jams after firing,no marks on the spent round thinking that the case is stuck in the chamber,any help will be great.thank you Bill
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| Sounds like you might have a match chamber and trying to use average ammo. SHF should be able to figure it out. It could be an extractor issue but I'd bet its a Headspace/chamber issue. The question is do you want a opened up Mil-Spec chamber or do you want to make your own ammo. |
| Not sure if I am reading your post right. Having problem with opening the bolt, but you are eventually opening the bolt. How did you get the bolt open? Several slaps with the palm of your hand? Using a hammer to get a few smart smacks? Now for the part that I am not sure of. When you get the bolt open, is the spent brass extracting with the bolt? Or is the brass still in the chamber? If that is the case, how are you getting your brass out? Are there any noticeable rings around the brass? Would look like from rough milling of the chamber. Enough Qs for now... |
| I've found that I have less problems with sticking with CBC and Winchester Brass. Lake City brass sticks pretty bad for me. I did find something that works great for aa brass puncher rod. The center rod from an old farm frost proff faucet is great because the end is brass and they are tough. You don't even need a hammer, just lift the bolt hold it open and slide the rod in and give the brass a tap and the mass of the rod will punch the brass right out. I've purchased a 50 BMG hone and hone oil from Brush Research Company and I've polished my chamber. http://www.brushresearch.com/brm/catalog It did make a big difference but there is still a little sticking. |
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That's a fairly common problem with some of the upper conversions and American Eagle ammo. AE ammo is pretty hot, and apparently expands the brass beyond its capability to contract. Also, your upper has no camming on opening so there isn't the force available to pop the brass from the chamber. Conventional rifles, like a Remington 700 or Winchester model 70 (and the McBros 50BMG bolt actions) have a bit of cam as you open the bolt that pulls the case free.
Most 50 guys use a rubber mallet to open the bolt if they have this problem occasionally. If it happens with any regularity, load your own with a lighter charge. Doesn't take much money to load ball ammo. Just a Lee 50 BMG kit and a few other accessories that you'll mostly have if you reload any other calibers. Been hearing of this happening with American Eagle for a few years now. -David Edgewood, NM |
| can not open the bolt, just lifting the lever in hard to move,hitting it with your hand will not work had to use a small piece of wood to move the bolt and when it opened the case came out without a mark on it, I let 1 round cool down after shooting the gun and it seem to stick worse ?. |
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Quoted:
can not open the bolt, just lifting the lever in hard to move,hitting it with your hand will not work had to use a small piece of wood to move the bolt and when it opened the case came out without a mark on it, I let 1 round cool down after shooting the gun and it seem to stick worse ?. Sounds like the ammo is to hot for your rifles chamber, if your fired brass is hard to chamber after it has cooled down then that is a sign of overpressure also. I have a half dozen .50's with different chambers and all but one will shoot my favorite AP load. I have one that shows the same problems you have, hard to eject and hard to put the fired brass back in the chamber, the other 5 shoot it just fine. Military Spec ammo is a little hot for most bolt guns. Ed |
Ed you hit the nail on the head that's what SHF found was the problem we test fired 3 different rounds starting with what i had the wra and he said it was too hot which the case stuck again, then fired the french and Argentina ammo and the spent cases popped out the ease well this was a learning lesson i felt bad for wasting this mans time but Walter is a great guy took it all in stride even sent home with a bag of ammo and the empty cases so when i'm ready to start reloading i have brass to use,now its time to head back to the range and have some fun!!!  
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