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About lstange

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    Louis Stange

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  1. 2020 Indiana Section Championship: Limited 46, Open 30, CO 27.
  2. And in August 2020, Carry Optics is the most popular division.
  3. If there are three GMs in your division at the Level II match and they place at 90% of the winner or above, you can get a classification bump. To get to C, you'll need to place at 45% of the winner or higher.
  4. To get classifier percent, your hit factor is divided by high hit factor for this classifier and division. The way USPSA determines high hit factor is not completely disclosed. For 19 series classifiers, it's the average of the top 10 results shot at 2019 Nationals where those stages were first introduced (except for Revolver, where they average fewer). For older classifiers, USPSA looks at historical data, throws out outliers (by some definition of outlier), then averages top-something remaining. Except for Carry Optics, where Production numbers are used instead.
  5. Seven weeks. Yes, cut out with scissors from some old plastic packaging. Seems to work fine, I ran a few thousand rounds with no visible shift.
  6. Yes, but people would shoot it with game-ready CZs and Tanfoglios rather than Glocks you can buy at a local gun store. That's what Production was supposed to be, and look what it became.
  7. Now there is. This is what just came back from service. Note different board color (blue instead of green), logo placement, and rotated center contact. I had to change the shape of the stopper to fit the new geometry.
  8. There is no new style board. When I sent the AF series DPP to Leupold, it came back with a note saying "replaced circuit board", but that "new" board looked exactly like the old board, with the same sticker.
  9. It lasted 10k rounds. A week ago started to lose brightness and occasionally turn itself off, sometimes coming back on after some shaking. Fresh battery, all visible contact surfaces are clean, the central contact did not slip. Sent back to Leupold.
  10. I had one lot of Syntech 124 grain 9x19 with PF=134 and another with PF=152. Same SKU, same gun, similar temperature, just different lots.
  11. On closer inspection it appears that the formulas used to determine HHFs for the 19 series classifiers are the same as for the 18 series, but there are at least two different formulas. In Production, HHF is the average of top 10 HFs. In Revolver, it's the average of top 10 HFs after excluding HFs that are below 90% of the stage winner. Also worth noting is that 19 series HHFs are different between CO and Production. Prior to 19 series CO mirrored Production. Maybe because 19 series classifiers are 12 or 14 shots with no mandatory reload, so a larger magazine gives an ad
  12. This calibration issue is easily addressed by converting classification percent to classification percentile. If your classification percent is x%, then classification percentile is approximately pnorm(x, mean=56.6, sd=17.9). USPSA can do it even better using actual distribution rather than normal approximation. Note that this transformation is monotonic, so it preserves rank ordering and does not affect discriminative power.
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