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  1. G

    Do we care more about, SD or ES?

    Since there's considerable misapprehension and misinformation about chronograph results, it may not be a surprise if remedying the lack of chronograph data is not a priority. What's ultimately important is the results on the electronic target regardless of what the chrony might show. With...
  2. G

    Do we care more about, SD or ES?

    It's not so much the "potato" (?) bullet shape or its BC that prevents many shooters from seeing repeatable 0.0xx groups at the testing center or elsewhere. Two things must always be kept in mind. One is that not all rifles/barrels can shoot so well, regardless of ammo. The other is that not...
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    Do we care more about, SD or ES?

    ES is not a reliable indicator of ammo quality. It can't guarantee results. It may not be helpful to predict results. After tracking MV vs POI for hundreds of ten-shot groups at 100 yards, it's clear that the relationship between the two is not consistent. The inconsistent relationship...
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    Do we care more about, SD or ES?

    For those who use a ballistics calculator to help prepare for shots at long or varying distances, when using the same kinds of bullets that weigh the same nominal 40 grains there's not much else ammo-related to enter. Ballistics calculators predict what should happen when using bullets that are...
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    Do we care more about, SD or ES?

    It's not helpful to think of only one or the other. ES shows only two things, the fastest and slowest MVs of a sample. It doesn't show anything at all about the other 48 rounds in a box. SD shows how alike the rounds are with regard to MV. A small SD means they are closer to each other in...
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    Show us your 0.0XX" 5 shot groups - .22 groups at 50 yards

    Shoot enough and there are bound to be a few small five-shot groups. Below at 57 yards. The top left was with SK RM, a very lucky result. The one to its right was CX, the bottom with M+.
  7. G

    Tuner Question

    Lee, thanks for the descriptive explanation of this theory. Many explanations seem to give little clarity about the way in which a tuner works. Your explanation is the clearest exposition of this theory I've seen.
  8. G

    Tuner Question

    A genuine question here, not meant to be anything else. Say a tuner is tested at 50 and one setting is found where the most improved results are verified and repeatable. Can the tester know which way he's using the tuner -- whether he's set it for the "anti-node" or if he's set it for positive...
  9. G

    Tuner Question

    In his 2022 book Modern Advancements in Long Range Shooting Volume III Bryan Litz describes and discusses his .22LR tuner testing. There's a practical reason why it ended in failure. His testing was done with a random lot of SK Long Range. When testing a tuner it's necessary to use ammo...
  10. G

    Tuner Question

    The take is with regard to rimfire, which unlike centerfire doesn't involve "load development." Shoot the best factory-made ammo available.
  11. G

    Tuner Question

    It may be like religion -- it depends on what you believe. If tuners work by achieving positive compensation, which helps faster and slower rounds have a POI closer together than otherwise, the answer is that settings are for a certain distance. The rounds with different MVs can converge only...
  12. G

    Whats a "good" 100 yard group size?

    It may not be a surprise to observe that few shooters have the resources to spend $60000 annually on .22LR ammo. That kind of outlay must be considered somewhat extra-ordinary. Finding .22LR ammo that performs consistently well is often, if not usually, no easy task. The process at ammo...
  13. G

    Whats a "good" 100 yard group size?

    Perhaps there's room for more education. If all rimfire ammo so hit and miss, it's a wonder that any shooters can ever score well in competition. Is there a method that successful shooters use for identifying ammo that shoots? It might involve more than buying random ammo and hoping against...
  14. G

    Longer barrel = Faster ammo?

    Lots are not always consistent over the chrony. When chronographing boxes at a time, many .22LR match ammos such as Midas + and Center X may have quite different ES and SD figures for each set of 50 rounds. Strings of ten shots don't give reliable information and will show even more variation.
  15. G

    Whats a "good" 100 yard group size?

    At 100 yards, few shooters can be fortunate enough to have ammo, rifle, and skill to hit the POA repeatedly and consecutively. If you consistently don't hit what you aim at over 100 yards -- a binary issue of success or failure -- there's going to be a great deal of failure. Emerson's...
  16. G

    Chrony data question

    That's fair. I don't know either and it's why I asked. Apparently there's no published information, online or in print, regarding the question. It seems that except for the experience shared by BowChamp (thanks!) there is no other info available on the question. Lee, while you're right that...
  17. G

    Chrony data question

    This isn't a trick question. The ammo is the same, the barrels are different. Do different barrels shooting the same ammo results in different or similar ES ranges and SD figures. They either do or they don't.
  18. G

    Chrony data question

    Not quite. You may be overthinking. The genie doesn't make perfect ammo. The genie makes identical copies of a box of high end .22LR match ammunition. No box of high end .22LR match ammo is made up of identical ammo. The identical boxes made by the genie are the same as the box of Tenex or...
  19. G

    Chrony data question

    Thanks for the replies. If it makes things simpler, allow me to add a detail. The rifles shooting the identical ammo not only have good shooting barrels, they are without ignition issues with the ammo in question. All rifles testing the exact same ammo in this hypothetical example are...
  20. G

    Chrony data question

    Imagine a genie made ten identical copies of a consistent box of high end .22LR match ammo. Each box was shot over an accurate chronograph with a rifle with a good barrel. Some barrels may be faster or slower than others. That's okay and not relevant. The question is, while they may not be...
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