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  1. R

    6mm BR

    They group every bit as tight at 100 yards as the Bergers and Scenars from a battle rifle on a bag and a bipod. Anxious to see if the 304 BC /drag curve holds up at distance at Black Bear.
  2. R

    Fighting the AI

    He's trying to figure out how to affix the MDT dildos to his Foundation.
  3. R

    Fighting the AI

    He washed his brass without pins so as not to peen the case mouths.......
  4. R

    Fighting the AI

    No you haven't.- You've shot five bolt gun matches and eleven one day PRS matches. Only in your clueless mind is that competing with the highest density of AI shooters in the world.
  5. R

    Proof Terminus Prefits???

    Fucking poor......
  6. R

    Extraction issue. Need advice.

    He's clueless.
  7. R

    New 300-Norma velocity ladder ...

    Same on this end. I got 3040 FPS (27") with 225 ELDM's and 86 grains. I had heavy bolt lift. I switched back over to N570 and then later to RL33 and 250s.
  8. R

    New 300-Norma velocity ladder ...

    Looks good. What length barrel? Thanks.
  9. R

    ES vs SD

    I understand that you are starting with an SD and mean velocity and applying the normal bell curve distribution to it to get your (+/-) SD and velocity range. How would chronograph margin of error factor into your calculation? You are assuming that the SD and mean velocity that you are starting...
  10. R

    ES vs SD

    The likelihood of getting that SD or predicting an SD with 20-30 shots is remote in a statistical sample. You would need to to fire upwards of 250 to 275 shots to even arrive a 95% confidence interval assuming a margin of error of 5% FPS. Maybe you as a ammo manufacturer, have fired this many...
  11. R

    New 300 Norma Mag build Twist rate question

    Could you post the 250 ATIP and 245 EOL sheets that you got when you did the doppler radar tests with AB?
  12. R

    New 300 Norma Mag build Twist rate question

    Interesting. With my old barrel, a 1:8, 27 inch 5R, I never had a problem with the 250s. I fired a fair amount of them through it at 3k using N570. I just started using them again with my current barrel, a 1:8, 27 inch 5R. I'm using RL33 at 2950. So far I have had no issues. I did have an issue...
  13. R

    New 300 Norma Mag build Twist rate question

    Thanks.
  14. R

    New 300 Norma Mag build Twist rate question

    Did you have 250 ATIPs that separated? If so, what was MV and twist? I'm just beginning to use them in a 27 inch 8 twist.
  15. R

    Accuracy International Picture Thread

    https://blackbearsc.com/membership.html
  16. R

    Accuracy International Picture Thread

  17. R

    Accuracy International Picture Thread

    Nice time at Black Bear today.
  18. R

    Reloading Equipment Primers VA/TN/WV/KY

    PM sent.
  19. R

    300 Norma Mag

    Did you get any chronograph data on the hot lot versus your other lot? Also, what was the lot number for the hot lot? Thanks.
  20. R

    300 Norma Mag

    How the hell did you get from 84.6 back to 81.0?
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