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  1. J

    Spin drift or other issue?

    The difference in impact between 50 and 100 yards? Windage Localized turbulence due to thermals or adjacent range features Precession and nutation affecting the trajectories. Bullets rarely travel a simple arc. They spiral around the initial fight path. Scope related alignment or parallax...
  2. J

    New Federal Match?

    Take a close look at the nose of the bottom right cartridge. :ROFLMAO: If that's going to be the future of "Match" cartridges, might as well sell off y'er custom barrels and grab some cheap 10/22's. ;) Would you like more chips with that order?
  3. J

    Group at 150 yards?

    Based on my logged groups... 0.5 inches at 50 yards on a good day is normal 1.5 inches at 100 yards outdoors is expected. 3.25 inches at 150 yards isn't a surprise and 4.5 inches at 200 yards with match 22lr cartridges.
  4. J

    .22 group expectations? and paper target

    I can produce small groups from 50 to 200 yards. My issue is consistency. Hence the description "random acts of accuracy". My other issue is punching center. Small groups don't correlate to my ability to hit the ten ring. Shoot a group, dial crosshairs to center of bughole, then attempt a...
  5. J

    22 LR Long Range Dispersion, What is the Culprit

    I don't send anything downrange when it's raining. I have no experience with those conditions. If it's raining, it's usually gusting and I put the rifle away to keep it dry. If I'm chasing squirrels or rabbits on a drizzly morning, the distance is less than 25 yards so effects are minimal. Not...
  6. J

    22 LR Long Range Dispersion, What is the Culprit

    For y'er perusal... https://www.gunsandammo.com/editorial/effects-rain-bullet-trajectory/372027
  7. J

    22 LR Long Range Dispersion, What is the Culprit

    Wind is annoying, no argument. Raindrop size is a whole 'nother irritation. Is rain considered a drift or an impact deflection? :unsure:
  8. J

    22 LR Long Range Dispersion, What is the Culprit

    The longer the range, the worse the spread. The causes? 1) Atmospheric conditions - mirage, thermals turbulence, gusts, wind direction shifts 2) Cartridge quality - symmetry, balance, uniformity of velocities The greater time of flight allows cartridge issues to be magnified. 3) Setup...
  9. J

    Remington 17HMR case head/rim failure

    Yes. I've had it happen with both 17hmr and 22wmr. Case rupture on the 17hmr was due to weak brass when it split at the edge of the rim that then vented downwards. The 22wmr was overcharged which blew chunks of brass totally separating the head from the chambered brass. Neither were out of...
  10. J

    1/2 inch at 100 all day long?

    Hey Sirhr, it's more of an educational exercise. All 50 shots at a single point of aim, any setup that makes you happy. Indoors or outdoors, offhand or fixtured rig with any rimfire at 100 yards. 22lr, 22wmr, 17hm2, hmr or wsm. The education is what happens when the entire box, all 50 shots...
  11. J

    1/2 inch at 100 all day long?

    Half inch spread all day long, right? Anyone want to make another attempt for the 50 at 100 yards? :sneaky: No? I can't even get any of the locals to try it anymore. :cautious: The results are all 1.25 inches or more. That outdoors in a tailwind with turbulence does a number on the 22lr.
  12. J

    1/2 inch at 100 all day long?

    I can do that no problem. :unsure: Of course I'm gonna need a butt load of sawhorses, 300 feet of half inch steel conduit, joiners and a few days to assemble the tube. After that every shot will come out the other end inside a half inch diameter. :cool:
  13. J

    Testing the Keystone 722 Varmint

    Wind shifts are why I stopped shooting groups. Sure, I have 5 shots touching, but they aren't consistent relative to my point of aim. My scope settings match the conditions of my first groups. As conditions change, my groups wander around so as an aggregate they result in total spread 2 or 3...
  14. J

    make me a pro shooter, help needed lol

    I use plastic drywall anchors to dry fire my CZ 455. It also showed me that my firing pin was contacting the breech face. Repeated impacts in the same spot cut through the edge of the anchor. To check your rifle, apply white-out to the face of the breech. Let it dry, then dry fire a few times...
  15. J

    make me a pro shooter, help needed lol

    That can happen with any rimfire if the pin makes repeated contact with the face of the breech. Plenty of images to view if you search "peened breech face" When the firing pin is harder than the barrel steel, repeated impacts will deform the barrel. If the steel of the firing pin is too brittle...
  16. J

    Testing the Keystone 722 Varmint

    If you shot in sequence 1-2-3-4-5-6, you caught a slight right to left breeze. 1 and 2 were good for the conditions you started with. By 3 it changed a small amount so 3 and 4 grouped left of center. 5 was the peak of the wind shift, then it dropped off a bit for 6. Even under calm conditions...
  17. J

    make me a pro shooter, help needed lol

    @308pirate Dry firing? :oops: Do you mean peening the breach face until it deforms the top of chamber? Or possibly damaging the firing pin? :rolleyes: Actually my real issue is wind judgement, not body position or squeeze. :cautious: Even with wind flags, I still manage to miss the lull...
  18. J

    Erratic performance

    I'm gonna need to see pics of the setup when in use, and the ammunition being used that's giving you 3 inch strays at 50 yards. Then I might be able to offer a useful comment.
  19. J

    Lapua Center X trending higher over time?

    D'oh! Never used a Kestrel, whizzed right past the data. dumadze. :( 12 degree increase would change the rate of combustion reaction. Higher pressure peak, higher velocity. Type of powder changes how temperature affects burn rate...
  20. J

    Lapua Center X trending higher over time?

    4/15 to 5/20....I'd be looking at temperature related velocity increase. Check weather records for the day/time shot. Compare velocity to temperatures, see how they relate.
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