07-23-2021, 05:26 AM
VASCAR2 Wrote:From what has been posted a 18 6.5 Grendel with rifle length gas system gas port diameter should .094.
For 18 mid length gas 6.5 Grendel barrel gas port diameter .076 seem to work well.
Thanks VASCAR2. Some good news. Pulled out my calipers and the gas port diameter appears to be correct. It just looked huge in comparison to my also brand new (and with a sparkling clean bore) Faxon 16" mid-length barrel which has the correct sized gas port.
But... (always a but, right?) now I'm somewhat disappointed. Not only does this 'brand new' barrel have the filthiest bore I've ever seen, I just read the thread about certain chambers not matching specs. So I thought I'd do a quickie check and dropped a Hornady SST 123 gr. round into the chamber. Of course, it stuck. Would not fall out. Tried to pull it out with a pick. Nope, not happening. I then had to go find my Dewey cleaning rod to push it out. It didn't take a particular great effort but it wouldn't just shake out. I then cleaned and oiled the chamber (which was also filthy) with some Hoppe's cleaner then a drop or two of oil. Tried it again. It stuck again. Tried using a PPU 110 gr FMJ and had the same results, tho it did not take near as much of an effort to push out.
For comparison purposes I also tried this on my brand new Faxon barrel. Oh yeah, did I mention just how sparkling clean it is? One could practically eat off the clean and shiny bore of this thing! Both cartridges fell right out as expected...