05-28-2012, 01:15 AM
I always take multiple mags to the range to make sure I have options to compare feeding with. I now look at the mags in advance, as I know what proper feed lip angles look like, and what improper ones look like, as I've seen one and had the same issues with a guy's blaster I was testing. The right feed lip top was more perpendicular to the mag's spine, when it should be at a slight upward angle to present the cartridge into the feed ramps.
CProducts turned out a lot of bad mags. Some people have never had a problem, while many others have, not only with the Grendel, but with 6.8, 7.62x39, 5.45, and 5.56 as well. The ASC mags are still in the "let's see" phase, but so far, they mostly seem good-to-go. I'm not sure if anyone has had an issue yet.
There is another huge metal magazine manufacturer working on Grendel mags, slowly, but surely, and hopefully they will do it right.
I'm personally looking at getting one 10rd PRI 6.8 mag and seeing if I cal load COAL to 2.300" and get reliable feeding. If I can load the 130gr VLD's and 129gr SST's to 1.300", that will be peak performance for the Grendel.
While talking with Bill A. this weekend, I learned that the barrel extension plays a big role in reliability with the Grendel, since the extractor needs to be able to open up further away from the bore axis than on a 5.56 gun, due to the Grendel's larger case diameter. If the manufacturer does not source higher-quality barrel extensions, the tolerance deviation in the inner diameter of the extension teeth can be out enough to prevent reliable extraction, since the extractor can't snap over the cartidge rim when going into battery.
There is one forum member who had this happening with his blaster, and we couldn't figure out what the problem was, even after sending his rifle back to Satern several times, and trying multiple different fixes that just didn't work.
If you take a $470+ cut-rifled barrel, and mate it to a $4 barrel extesnion, you're likely to be stuck like chuck. There is a dimensional variance that takes place in the heat-treating of the barrel extensions, and it actually can make the inner diameter of the teeth ever so slightly oblong, so that the extractor can't snap over the cartridge.
Ya learn something new every day I guess...
CProducts turned out a lot of bad mags. Some people have never had a problem, while many others have, not only with the Grendel, but with 6.8, 7.62x39, 5.45, and 5.56 as well. The ASC mags are still in the "let's see" phase, but so far, they mostly seem good-to-go. I'm not sure if anyone has had an issue yet.
There is another huge metal magazine manufacturer working on Grendel mags, slowly, but surely, and hopefully they will do it right.
I'm personally looking at getting one 10rd PRI 6.8 mag and seeing if I cal load COAL to 2.300" and get reliable feeding. If I can load the 130gr VLD's and 129gr SST's to 1.300", that will be peak performance for the Grendel.
While talking with Bill A. this weekend, I learned that the barrel extension plays a big role in reliability with the Grendel, since the extractor needs to be able to open up further away from the bore axis than on a 5.56 gun, due to the Grendel's larger case diameter. If the manufacturer does not source higher-quality barrel extensions, the tolerance deviation in the inner diameter of the extension teeth can be out enough to prevent reliable extraction, since the extractor can't snap over the cartidge rim when going into battery.
There is one forum member who had this happening with his blaster, and we couldn't figure out what the problem was, even after sending his rifle back to Satern several times, and trying multiple different fixes that just didn't work.
If you take a $470+ cut-rifled barrel, and mate it to a $4 barrel extesnion, you're likely to be stuck like chuck. There is a dimensional variance that takes place in the heat-treating of the barrel extensions, and it actually can make the inner diameter of the teeth ever so slightly oblong, so that the extractor can't snap over the cartridge.
Ya learn something new every day I guess...