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Recent content by SIDS01

  1. S

    New Berger 375 bullet 410 hybrid

    We call those backstops. After you try one, you may not go home. Shooting ridge to ridge has its own problems, but unless it drops right behind the target, over the top is generally not a "no call". What I was going back looking for is the brand and type of the 407s?
  2. S

    New Berger 375 bullet 410 hybrid

    Your first sentence is a misconception. Yes, I've been testing things is a structured way for a long time, but I'm only providing numbers from Litz's "Modern Advancements In Long Range Shooting, Volume 3". If you only read one of them, read that one. The whole series is provided at their...
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    New Berger 375 bullet 410 hybrid

    With apologies to Pete for talking about him like he's not in the room, my take on his questions was why don't they give the groups and velocity spreads you're getting? I'm trying to dissuade him from searching for the answer in seating depth or charge weight. He's inclined to replace the...
  4. S

    New Berger 375 bullet 410 hybrid

    Oh, shit, I thought the reason you bought so many based on that one group was you needed the boxes for your sort.... You loaded 20, what did the other 3 groups and stats look like? I was trying to use your group to make the point that picking a reasonable charge and jump is just as likely to...
  5. S

    New Berger 375 bullet 410 hybrid

    Thanks for that. It's actually what I was fishing for. In one of his books, Litz found the 30 cal 200 grain Hybrid BC changed about 1% per 0.010" difference in length. I use that as an anchor point to scale the effect to different bullet weights and calibers. I might be off in my scaling...
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    New Berger 375 bullet 410 hybrid

    Given his predisposition to use as much of the neck length as possible, if he has multiple firings on a brass/chamber combination that gives less than 0.004" of neck expansion after firing, it just may. It certainly has a better chance of clearing up the problem than working through tenth grain...
  7. S

    New Berger 375 bullet 410 hybrid

    +- 0.020 on the length and you're worried about concentricity? The variation in COA should be about the variation in bullet length. If there really is 0.040" variation in the length of those bullets, they need to be sorted to 0.005". Or trimmed. If you point them after trimming, leave a...
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    New Berger 375 bullet 410 hybrid

    There are endless versions of the loading process decision tree. Whether a particular process or strategy is a good idea or not depends on the other decisions you've made. That being said, in general, positioning the back of the bearing surface ahead of the neck can be a good strategy. The...
  9. S

    BC Correction

    Thank you, that's a bunch of useful information. The sky screens are not really an option at the shooting locations I have available. I'm past trying to find BCs as an eternal truth for all ranges for each gun. I'm after shot to shot BC variations and how they change with barrel wear or...
  10. S

    BC Correction

    A post with more information on the Oehler 88 at 2 miles would generate a lot of interest. Details on the downrange target and some sample data would really be appreciated. In one of the papers on the website, Oehler wrote that under 1K yards, it doesn't really matter if you use G1 or G7 as...
  11. S

    URSA NorCal – Saturday and Sunday, April 26-27, 2025 – URSA 3K (2025) - postponed to May 18th (weather)

    The first target is at 2125 yards and the DA is 4k'. If you have something that'll do that in under 30 mils, have an optic that can do that on the turret, and can load ammo to under 30 fps for 10 shots, I'd give it a try. What you think you need will likely change after you've done it a few...
  12. S

    BC Correction

    Let me know when you'd like to give that a try. I built this a couple years ago. I can set it up myself, but it's much easier with 2 sets of hands. The gun needs to be over 1300 fps at the old NorCal URSA 2K shooting position. Velocity won't work though. I get the most consistent results...
  13. S

    BC Correction

    Were all of the 1242 yard shots exactly 2899 fps? If they were not measured individually with a LabRadar or similar, that is one of the more likely problems. Change the velocity 20 fps and compare the impacts to the 806 and 1242 yard firing solutions. It'll be a lot larger at 1242. In the...
  14. S

    Is bullet still stable/accurate after it goes subsonic?

    It's like anything else, some do it a lot better than others. I look at it like a game of Blackjack. You can't win every hand. Some can stretch a little luck a long way, others piss away opportunities. The first shot brings other uncertainties into the mix. Knowing what you're up against...
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    Is bullet still stable/accurate after it goes subsonic?

    Thank you. I'm nobody. Just another hobbyist who occasionally competes. I scored the first shooter point in the URSA for 5/10 on a 37" gong at 2K yards in 2015. SIDS01 is Shooter ID, Shooter #1. I get to be #1 forever because I was the first, not because I'm the best. I switched to that...
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