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Posted: 7/31/2005 10:52:02 AM EDT
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New to membership, been reading the site for some time. Always great discussions. I have a new Model 1 6.8mm SPC upper on my Bushy lower. Just ran some reloads through it yesterday and was wondering if anyone had any advice. Both loads were from IMR and Hodgdon sites. IMR 4198 23.5 grains, Hornady 115 grain OTM, 2515 fps, 50,000 PSI. Very accurate (two holes usually touching, one flyer out to about 1 inch - probably me), but some failed to lock the bolt back on last round and one failed to cycle fully enough to strip the next round from the magazine. NO signs of excess pressure (and this is listed as a max load). I was wondering if anyone has pushed this further with additional IMR 4198 above 23.5 grains. Hodgdon H322 28.2 grains, Hornady 115 grain OTM, 2608 fps, 53,300 PSI. Not as accurate at 1.5 to 2 inches. Again, NO signs of excess pressure. Any comments at all or experience would be greatly appreciated. |
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Check out the tacked thread on this forum - all the 6.8 info you can stand! For your feeding problem, it sounds like a lack of gas pressure in the system. I had the same thing happen with a build a month or so back. I didn't get the gas port in the front sight block lined up with the gas port in the barrel. Results were that the bolt wouldn't lock back, empties didn't eject very far, and it would fail to strip the next round... Spooky |
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