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Posted: 3/14/2015 8:44:10 PM EDT
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Quoted:
I'd agree with that; I'm not going any further. Mostly trying to figure out if that 23.1 load is safe to shoot. Quoted:
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If it were me, I'd call that the limit. I'd agree with that; I'm not going any further. Mostly trying to figure out if that 23.1 load is safe to shoot. I'd back it off a bit, but I rarely push max loads. It looks like you're being careful about brass consistency, etc - I'd pay very close attention to case head separation (use the paperclip trick), and expect that brass to wear out pretty quickly (I'd be surprised at more than 4 or 5 firings). When I see pressure signs, my personal SOP is to back off at least until I'm not seeing them anymore. If you want to ride the limit, you'll have to be pretty particular about paying attention to your variables. |
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Wow...... I just want to post here to say that this website & forum is the most helpful thing I have ever seen. It has really opened my
eyes up to the genius & technical aspects behind semi-auto service rifles. In my earlier years I was a die-hard bolt action purist. The internet has really made it easy for help & finding information. Years ago all we had to go to were manuals, books, magazines, word of mouth from friends & others, & being lucky enough to run into custom gunsmiths who knew all of these things. |
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Great link. This is a good short read for all of us AR-15 handloaders. Thanks for posting. |
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I am having the same swipe issue with XBR. 75gr hpbt, lc brass, wolf primer (the non magnum softer cups) and 23.1gr XBR. 1/7 twist 16" ml 556 chamber barrel. Brass land at 4 oclock
I don't get the swipe with 556 pressure loads with various other powders. But max 223 xbr loads do. My primers look good, nice rounded edges. I have had loads with other powders flaten my primers but not cause head swips. My 1/8 twist 16" ml ss does not have this issue and its supposed to have a tighter chamber. |
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Great article. So what should be changed 1st, buffer or spring? So if i am getting pretty bad swipes, go heavier, correct? My brass seems to be ejecting at 2 o clock. Neither. By the time the buffer starts moving, the bolt has already rotated and the brass is swiped. Correct an overgassed gun with an adjustable gas block. |
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Quoted:
Neither. By the time the buffer starts moving, the bolt has already rotated and the brass is swiped. Correct an overgassed gun with an adjustable gas block. Quoted:
Quoted:
Great article. So what should be changed 1st, buffer or spring? So if i am getting pretty bad swipes, go heavier, correct? My brass seems to be ejecting at 2 o clock. Neither. By the time the buffer starts moving, the bolt has already rotated and the brass is swiped. Correct an overgassed gun with an adjustable gas block. For the bolt of come out of battery the carrier has to move back about 1/2". Having said that I don't think even an H3 buffer will slow it down enough. |
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Quoted:
For the bolt of come out of battery the carrier has to move back about 1/2". Having said that I don't think even an H3 buffer will slow it down enough. Quoted:
Quoted:
Quoted:
Great article. So what should be changed 1st, buffer or spring? So if i am getting pretty bad swipes, go heavier, correct? My brass seems to be ejecting at 2 o clock. Neither. By the time the buffer starts moving, the bolt has already rotated and the brass is swiped. Correct an overgassed gun with an adjustable gas block. For the bolt of come out of battery the carrier has to move back about 1/2". Having said that I don't think even an H3 buffer will slow it down enough. Thanks. This is happening on my 308 AR with a 10.5 inch barrel. Shooting 150 gr hornady fmj using 40.0 gr of imr 4064. Was thinking of backing down on the powder a bit to see if this would help. |
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