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About al503

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    muffin top
  • Birthday 03/21/1971

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    Portland, Oregon
  • Real Name
    Al Suh

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  1. Why replace basepads for production

    The extended pads also make seating the mag a little easier.
  2. 9mm Major Primer Results?

    I hear ya. That's why I load un-compressed loads to 1.19" Besides the powder keeping the bullet from setting back into the case, I think it also helps stop any movement that might allow the bullet to rock/work itself out of the case as well.
  3. 9mm Major Primer Results?

    I've shot several K loaded at 1.21" without issue. You have to go a slightly shorter with zeros and PD as they're slightly shorter than MG). I load non compressed loads (AA7, SP2, True Blue, etc.) at 1.19" (with PD, MG and Zero bullets) without issue. I'd check your crimp. I leave a .0 to .0005" bell at the case mouth to avoid over crimping.
  4. 9mm Major Primer Results?

    Sounds about right. If your freebore allows, you can load an MG 124 grain bullet out to ~1.21" You don't have to worry about setback because of the compressed powder. You also get lower initial pressure as you're loading closer to Super v. 9mm length.
  5. 100rd sample pack. Acme. Quality concerns.

    Bought some 147's a while back. Instead of an extra bump of lead at the base, many had voids and were under weight. I just shot them up in practice and went back to my go to brand. Didn't have any issues with the 180's, though.
  6. STI .40 Cal With Tight Chamber......

    The first thing I'd do is visually check the chamber with a light to see if there's some gunk/fouling/powder residue/etc., that's keeping it from going into battery. Then I'd take a nylon bore brush, chuck it into a cordless drill and clean the chamber out.
  7. New CK Arms open gun...bullets tumbling

    No reason not to be able to load longer than 1.14" I loaded MG 124 JHP's out to 1.21", almost 38 super length, with a compressed load (3n38.) No issues with set back. I've rechambered several rounds 5 times and they lost from 0 to .001". I settled on 1.2". No reason to keep the initial pressure spike to a minimum, if you can.
  8. New CK Arms open gun...bullets tumbling

    Before backing off the crimp, I'd simply pull a bullet from a loaded round and check the bullet for an indentation where the rim was. You might also do the plunk test. A couple owners are loading at 1.14" so the bullet isn't engaging the rifling in battery.
  9. 18 vs 16 vs 14.5 JP-15

    The 6.9 lbs was with the RC hand guard without the thermal dissipator. Not 100% sure that the light contour is the standard but that's the one you want. They make a medium contour as well. The medium might be good for shooting prone or off a bench, or for some heavy mag dumps but probably a little heavy for 3 gun, IMHO.
  10. 18 vs 16 vs 14.5 JP-15

    I'm not an AR expert (or even close) but the big advantage in going 18" is: 1. the rifle length gas system (shoots a little softer) 2. more than adequate velocity without running too hot. 3. the extra weight of the the bbl will help you stay on target a little better. I'm not sure but I'd be willing to bet that the 14.5" and the 16" use the same (my guess would be a mid length) gas system so you might as well go with the shorter one for transitions and faster handling. I have 2 18" light contour bbl JP-15's. While they're expensive, they're definitely worth it and you won't regret it. They weigh 6.9 lbs (bathroom scale) without an optic. Forego the thermal dissipator and the rapid configuration hand guard is a titch lighter than the MK III. JP has a titanium comp that wasn't available when I bought mine. That should save an oz or two where it'll make the most difference in transitions. You can always swap in a CF hand guard to lighten it up. The 15.5" RC is about 14 oz. I have a 15" CF that weighs around 6 oz. 8 oz in front of the receiver should be noticeable. Hope that helps.
  11. Yes. MG and Zero's are my go to's for open.
  12. You can have different case wall thickness with different head stamps. That difference might affect how far the bullet gets pushed into the case by the seating die. That (or that in conjunction with other factors) could make the difference.
  13. Are you measuring rounds that are made when all of the stations of the press are filled? Other things to check/do: Pick out single headstamp brass to measure Make sure that your primers are at least flush/below flush Try to feel the same amount of click/stop/thud, whatever you want to call it when you hit the bo.ttom of the stroke If you're loading a compressed load, that could be the culprit as well.
  14. .223 shell plate dies I think the locator pins, case feed plunger and brass expander are the same. Not 100% sure but I would think that the case feed adapter would be the same.
  15. 135g Blue Bullet Open Pistol load data

    Should be a nice load. It'll be soft but that should be enough powder to still make some gas for the comp.