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  1. J

    1/2 MOA at 100 yards, all day, every day!

    Sub-moa groups aren't a big deal. I call them random acts of accuracy. I can produce sub-moa groups, but producing sub-moa groups that don't wander around relative to point of aim is another thing entirely. I've had youngsters at the local range show me their results and claim sub-moa all day...
  2. J

    Rimfire Barrel Thought

    I can decrease the barrel diameter, but can I do so in a way so as to produce an even taper, not distort the rifling and not create stress lines in the steel that will show when heated? I don't think I can. :unsure:
  3. J

    Better .22 ammo?

    Plenty of publications that discuss the original 22 rimfire cartridges history/development. It was intended for use as a small game hunting/varminting cartridge. As a black powder cartridge, it was effective for offhand short range use. In an era where stalking was still a necessary skill, you...
  4. J

    1/2 MOA at 100 yards, all day, every day!

    Yep, every rifle has a cartridge preference. Finding that brand is a neverending search. Why? The damn rifle will change it's mind. :( Seriously, that's exactly what happens. I found a brick of SK made Wolf Match Extra. Sub moa 5 shot groups at 100 yards consistent as heck. It was glorious...
  5. J

    1/2 MOA at 100 yards, all day, every day!

    Stand by....found it.... https://www.snipershide.com/shooting/threads/the-whole-box-at-100-yards.7033547/
  6. J

    1/2 MOA at 100 yards, all day, every day!

    Hey Jeff, a couple years ago, I asked what would happen if you sent the whole box at a single aim point, using rimfire at 100 yards. Any setup, any caliber, indoors or out, and no one could hold 1/2 inch at 100 yards. Three shooters were able to hold sub inch, but not by much. Ammunition...
  7. J

    Rim-x Build in progress, which ammo brands (wax) play well together

    Try this.... Shoot for score, not groups. ARA or USBR 50 yard benchrest targets. See if swapping back and forth between brands improves y'er score. If changing lube improves results, then the score should be better. It didn't work for me. :( Think it'll work for you?
  8. J

    Better .22 ammo?

    Captain Obvious here....22lr/rimfire is 1800's technology. It's limitations are due to the era and purpose it was engineered for. I'm pretty sure that there have been improvements made in ammunition tech since. Priming methods, powder chemistry, case and bullet manufacture have changed...
  9. J

    Rim-x Build in progress, which ammo brands (wax) play well together

    From my results at 100 and 200 yards, y'er hunting the lots with the fewest cartridge defects, the tightest/consistent muzzle velocities and the average muzzle velocity that best fits y'er barrel/rifle harmonics. Brand doesn't seem to matter if those 3 points are covered.
  10. J

    Rim-x Build in progress, which ammo brands (wax) play well together

    With lead being a lubricant, along with tallow, beeswax and paraffin, I'm wondering just how much difference there is in the coefficient of friction when forcing a lead bullet through the polished bore of a rifle barrel? I question the belief that variations in brand lubrication affect results...
  11. J

    The effects of the transition from super to sub sonic on the 22lr

    If'n y'er wanting to understand what's going on with y'er 22lr cartridges at extended range, take a close look at them before chambering them. When the cartridges are dented, dinged, drive bands are asymmetric, bullet is unevenly seated, visibly beat up, muzzle velocities all over, do you really...
  12. J

    Maximum range of standard velocity 22LR

    Hey BigDaddy, nobody said ya' had to shoot into the wind, eh? Even Jim Croce knew better than that. ;)
  13. J

    Maximum range of standard velocity 22LR

    Obx, ya' can still get 'er done. Take y'er rifle up Mt. Baldy, Cimmaron, get to the top, hold level, let 'er rip. With the peak elevation of 12,441 feet it'll work. Slope distance counts too. ;)
  14. J

    Maximum range of standard velocity 22LR

    Ran it through gundata ballistic calculator 28 degrees inclination, 1500 yard zero, 100 yard interval Peak of the trajectory is about 360 feet above muzzle
  15. J

    Do we care more about, SD or ES?

    Yeah G, but that's the little I have read regarding variations when understanding ballistic coefficients. Most of the BC formulas I found appear to be averaged, not calculated for individual moments in the trajectories. Close enough for my drop calculations, when trying new cartridges.
  16. J

    Do we care more about, SD or ES?

    What little I know of bc variance, is that that biggest variations occur in the transonic zone. That'd be from about 1350 fps to about 900 fps. Interestingly enough, that is the muzzle velocity range of most 22lr brands. The information was part of an article by Sierra. Had the link saved...
  17. J

    The effects of the transition from super to sub sonic on the 22lr

    JG, next time you get a chance, fire 10 shots, remove the bolt, then look down the bore. Let me know just how many burn residue clumps you see. Note the clump sizes and their locations. They are caused by water vapor condensing on burn particulates and clumping together during the pressure drop...
  18. J

    Do we care more about, SD or ES?

    Time of flight from muzzle to target determines the amount of drop, right? Gravity is 386.09 inches squared. Time of flight can be obtained by direct measurement with optical sensors or approximated using a ballistic calculator. Drop = 1/2 x 386.09 x time of flight squared. Calculate drop1...
  19. J

    Do we care more about, SD or ES?

    A ballistic chronograph is a diagnostic tool to assist in trajectory analysis. If you are working on understanding the "why," it's useful. For testing to find ammunition to produce the best results, unnecessary. As has been repeated ad infinitum, the targets tell you what works, what doesn't. I...
  20. J

    Do we care more about, SD or ES?

    Yes, it's true, I'm guilty of oversimplifying standard deviation. Most never apply any statistics to their chrony numbers. They state the numbers as displayed from the chronograph as data with no interest in further analysis. Rarely do they include the actual sample size. I want to know the...
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