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  1. Constructor

    Nothing like a brand new rusted barrel, didn't even need to scope this one! :)

    It's been awhile but still shooting a 6.5-08AI? https://www.6mmbr.com/gunweek046.html
  2. Constructor

    Accuracy issue due to burr at gas port?

    Geez, that looks like and old Marlin 444 microgroove. I can't really tell where the lands are but if that port is going through a land it's not going to help accuracy.
  3. Constructor

    Geissele GFR 6 ARC

    Wonder if they spiral around the barrel to avoid the lands????:LOL:
  4. Constructor

    Nothing like a brand new rusted barrel, didn't even need to scope this one! :)

    https://cogsdill.com/products/deburring-tools/micro-burraway/ https://mollart.com/featured/e-z-burr-hss-tools All 3 links I provided go down to .040", that's smaller than any gas port in any AR barrel. Also they can be turned by hand or at any speed.
  5. Constructor

    Nothing like a brand new rusted barrel, didn't even need to scope this one! :)

    You really should read slower and research before posting.
  6. Constructor

    Nothing like a brand new rusted barrel, didn't even need to scope this one! :)

    Look at the photo the gas port(# 4 in the first post)it cut all the way through the land. Yeah, I've drilled around 75000 gas ports in the last 14 years. I know it can't be controlled on a button barrel but the maker can control what he ships out the door.
  7. Constructor

    Nothing like a brand new rusted barrel, didn't even need to scope this one! :)

    There are a few different types. The hole shouldn't be through a land. I know the way it's done on button AR barrels it can't be avoided but those barrels should be tossed to the side. A hole going halfway through a land isn't a big deal but if you look at your photo on the lower side you will...
  8. Constructor

    Nothing like a brand new rusted barrel, didn't even need to scope this one! :)

    They make a tool to remove burrs on a hidden hole. https://ezburr.com/product/micro-series-hss/
  9. Constructor

    Best 12.5 barrel?

    That would be caused by using tools much longer than they should be. Most barrel manufacturers turning out a good number of barrels are using carbide reamers. The only company I know turning out hundreds of barrels using HSS reamers is Green Mountain and the chambers are rough. What I do with...
  10. Constructor

    Nothing like a brand new rusted barrel, didn't even need to scope this one! :)

    The gas port hole hit dead center of the land, IMO that will always drag copper off the bullets and cause copper fouling from the port to the muzzle.
  11. Constructor

    Best 12.5 barrel?

    The only way to really know is buy some barrels and test them against each other. It isn't just one thing that increases velocity without causing excess pressure.
  12. Constructor

    Best 12.5 barrel?

    Sorry Frank, I don't need your approval or you to test the barrels I have been making since 2009.
  13. Constructor

    Best 12.5 barrel?

    No none of those barrels have the same spec just like yours aren't the same as Krieger, Broughton, Rock. Lilja or Hart. You keep saying the barrels can't be compared but the general public does it every day. Back in 2008-2009 when I was making custom high power barrels and accurate barrels for...
  14. Constructor

    Best 12.5 barrel?

    Every builder sets their rifle up differently, some may plan to use a standard spring and buffer and some may start with a red spring and H2. The port must be matched to the ammo being used and the way the rifle was built or the build needs to change around the way the barrel was ported and the...
  15. Constructor

    Best 12.5 barrel?

    It takes about 30 seconds to drill out the gas port after removing the gas block. We have been making mid gas 12.5" barrels since 2010 and use a .081" port. If you want it to work with Wolf and without a can it will be over-gassed with m193 or MK262 with a can, there is no way around it...
  16. Constructor

    Best 12.5 barrel?

    Ernest, you didn't ask me but most AR barrels are not lapped. Some AR barrels are lapped because the tooling marks are so bad they have to be lapped. Other companies have figured out the lube to use, the pull speed and button coating to cut down on tooling marks. I've been Meloniting barrels...
  17. Constructor

    Best 12.5 barrel?

    What is stuck in your head that makes you think that? There are thousands of people every day comparing BCA, to Faxon, to PSA to BA to Criterion to Wilson to BCM and the questions on this forum show that. None of those barrels have the same specs. and by specs I mean exact same chamber, exact...
  18. Constructor

    What AR trigger is best for hard 7.62x39 primers?

    If you remove material from the front of the firing pin shoulder it does the same thing, move the firing pin forward. With the Grendel the face of the bolt is .012" further toward the rear and the bolt is longer, does that also reduce the contact and effect the force? It's .010", about the...
  19. Constructor

    What AR trigger is best for hard 7.62x39 primers?

    why do you think that?
  20. Constructor

    Geissele GFR 6 ARC

    I like their triggers but, not really impressed with the rest especially after their gas port issues and the answers they had.
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