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  1. __JR__

    Gunsmithing Barrels and metal defects/inclusions

    In fact I'd want that barrel back home and out of circulation PDQ so it could be fully dissected and analysed.
  2. __JR__

    Gunsmithing Barrels and metal defects/inclusions

    Looked frosty on the phone. Yeah, at 250 rounds you have a case for a rebarrel for sure. I wouldn't even question it here.
  3. __JR__

    Gunsmithing Barrels and metal defects/inclusions

    Pardon my ignorance, but that is a chromed barrel?
  4. __JR__

    Gunsmithing Thinking the Smith screwed my barrrel

    I'll usually fluff the end of the qtip out before dragging thru, yes if there is some pickup or a burr it might be accessible enough to remedy fairly quickly. Have had 2+MOA guns go to 1/2MOA after correcting.
  5. __JR__

    Gunsmithing Thinking the Smith screwed my barrrel

    Qtip rub on muzzle exit might lead you to water.
  6. __JR__

    AR10 with 6.5 Upper showing signs of overpressure

    Kenny, just saying S&B is a bit hot and a bit close to lands for a gas gun. Not that I know anything more than the next guy, but am barreling 6.5's for KAC. FWIW.
  7. __JR__

    AR10 with 6.5 Upper showing signs of overpressure

    I've been watching real close CBTO on factory 6.5CM (in my job description). S&B is the furthest out by far, and is loaded hot. If you're running anything less than SAAMI, you're probably loaded into the lands.
  8. __JR__

    Gunsmithing Gain twist fluting, variable twists, automated code generation.

    Why'd you do it...bc you could. Get a patent on it before ER Shaw sees it lol!
  9. __JR__

    AR10 with 6.5 Upper showing signs of overpressure

    S&B, that tubby little round. It's going to running not far off the lands in a SAAMI 6.5CM throat which will drive the pressures up. Hot in most gas guns.
  10. __JR__

    Gunsmithing button rifle barrel mystery.. anyone want to weigh in

    The 'pickiest' barrels I'd been around, picky for groove dimension, was the 7.5 Swiss. Well, those and bore riders. The swiss shot a conical bullet which formed the parallel on the back end of the bullet and yeah you had to be just so. Just strange that this RDF would be that finicky in a...
  11. __JR__

    Gunsmithing button rifle barrel mystery.. anyone want to weigh in

    Agreed
  12. __JR__

    Gunsmithing button rifle barrel mystery.. anyone want to weigh in

    Bore drives the bullet, doesn't affect pressure much as does affect jacket if too thin but can help accuracy. Groove drives the pressure based on throat, so you gotta look at those two things there for velocity. Cross section also important and probably still well in the ballpark. If the...
  13. __JR__

    Gunsmithing button rifle barrel mystery.. anyone want to weigh in

    Don't get too hung up on the .2564/.2644..it's not half thou oversized, that is well within 6.5 accuracy standard tolerance depending on the bullet. So did you measure the major diameter of the bullets?
  14. __JR__

    Gunsmithing button rifle barrel mystery.. anyone want to weigh in

    Ha..spin the tool or the barrel a little faster at the end, basically. Tool has to be right for it. Now the real zinger is who makes handlapped gain twist barrels?
  15. __JR__

    Gunsmithing button rifle barrel mystery.. anyone want to weigh in

    Oh yeah. Dan Lilja started his stardom on GT button rifled barrels..
  16. __JR__

    Gunsmithing button rifle barrel mystery.. anyone want to weigh in

    You're probably alright on the drive side of the groove just a little more clearance than needed on the 8.5 vs 8, the trail side depending on their clearance may have dragged a bit. You might be able to detect it with an eyeball inspect, the geometry might look a bit squint. The standard...
  17. __JR__

    Facebook officially admits they censor, monitor & scan all messenger content including pictures

    So does Frank
  18. __JR__

    Gunsmithing Land to land dimensions?...

    oh my. Go to www.saami.org, which will give you the standard bore diameters, or http://www.cip-bobp.org for the metricated. 22LR--.217 5.56--.219 308/300BLK--.300 7.62 x 39--.300 9mm parabellum--.346 sometimes .347 6/243--.237 6.5/264--.256 6.8/.270--.270 7/284--.277
  19. __JR__

    BSF carbon fiber barrels?

    What does the BS stand for?
  20. __JR__

    Bartlein wylde barrel.....5r or 4 groove

    Don't reckon it matters so much groove count but quality, and the right throat.
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