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  1. Ledzep

    62 ELD-VTs and twist rate

    If you have any gyro stability questions on a bullet that's in the 4DoF library, use 4DoF data table to get the SG #'s. It will be the most accurate stability calculator easily/freely available as it uses the physical/mass properties of the specific bullet in its calculations.
  2. Ledzep

    308 vs 6 ARC & 6.5 Grendel

    Good call. I'll edit my post. I got wires crossed. Everyone gets to be an idiot sometimes. ETA: Just remembered why. The original purpose was to achieve greater terminal performance (energy delivery), not necessarily retained energy. The leg up is the way the 106 TAP bullet performs vs...
  3. Ledzep

    308 vs 6 ARC & 6.5 Grendel

    EDIT: Ledzep is idiot. I thought it can be disputed but it can't :) . No ragerts. I tried building .308 and 6.5 Creedmoor AR-10's and never could make one that I liked. Heavy "precision" rifles down to super-light weight 16" rifles I could never love using them. Tried to. Couldn't get...
  4. Ledzep

    Hornady 134 eldm issues

    It happens occasionally unfortunately. Can be from several reasons (press setup, handling, material). I don't have any specific info on that lot or that bullet but if you continue to see issues feel free to call tech support again. In my experience this won't cause fliers in random...
  5. Ledzep

    62gr ELD-VT in a 22-250

    In a 1:8 should be no problem. 1:10" twist will not work.
  6. Ledzep

    Wet Mounting Scope Mounts - Where It All Started

    We see the same thing in our indoor tunnel. No external light, no mirage, bolted down heavy rail gun fixture. If you push the objective around, the image goes the direction you push. Bullet POI doesn't change but you can move where the scope is "looking" with surprisingly little force. The...
  7. Ledzep

    Wet Mounting Scope Mounts - Where It All Started

    In the early 1940's the Swiss tried several German optics/mounts and were dissatisfied with the zero retention and general ruggedness of the optics and mounts so they solved the problem by filling the gap between the optic and receiver with weld... So at least we know there's a nuclear option...
  8. Ledzep

    Wet Mounting Scope Mounts - Where It All Started

    Maybe we should start greasing our inlets/bedding, too? :)
  9. Ledzep

    Wet Mounting Scope Mounts - Where It All Started

    I think we're thinking 90 degrees different. My comment was in regard to something impacting the side of the scope/mount as if it were dropped. In that instance you have elastic deformation of the clamp assembly then the clamp rebounding. I don't know if that's what's happening. I've...
  10. Ledzep

    Wet Mounting Scope Mounts - Where It All Started

    https://emweb.unl.edu/negahban/em223/note16/note16.htm Both topics boil down to coefficient of friction on mating wedge surfaces. Just like you get more clamping force on a lubricated bolt for the same torque, you will get more clamping force on a mount/rail interaction with lubricated...
  11. Ledzep

    ARC Xylo - wood cheek piece?

    Up and down, pretty much all of it. I lost some on the bottom, but it's able to adjust way lower than you'd ever actually use with any sighting system. Front-to-back I had to pick where it needed to be and filed the "dish" shapes in based on where my face hit. And obviously side-to-side I...
  12. Ledzep

    ARC Xylo - wood cheek piece?

    dupe
  13. Ledzep

    ARC Xylo - wood cheek piece?

    Here's some close ups of mine. Endmill slot to match profile of the support base, countersunk holes for the screws to hold it on. So far haven't cracked it in half (knock on... wood..). :)
  14. Ledzep

    ARC Xylo - wood cheek piece?

    I'll get a picture up when I get home from work this evening. A guy could do it with hand tools pretty easy. I cheated and used a mill but finished the shaping with files. Edit found one
  15. Ledzep

    Advancements in bullet design...

    Not sure if this link will work but Robert McCoy's, "Modern Exterior Ballistics" is the foundation for all of the math/physics that describes what's happening in this field. Even if you don't do calculus and differential equations there are charts and concepts discussed that are worth the read...
  16. Ledzep

    Advancements in bullet design...

    Cutting Edge, Werner, Lehigh, PVA... There are a few that lathe turn monolithics. There is definitely a limit for length vs. diameter and skinny profiles. Especially on the back end (BT). With things like this you have to understand the assumptions made to make a model work, and the...
  17. Ledzep

    Ice Bullet

    100% chance of an incoherent blast of all three states of dihydrogen monoxide.
  18. Ledzep

    Hornady Full length die with pit in shoulder area?

    Yup, if you take off the lock collar you'll see it goes all the way through.
  19. Ledzep

    Hornady Full length die with pit in shoulder area?

    Bleed hole for excess lube to escape so you don't dent shoulders as easily.
  20. Ledzep

    Vintage Sniper Rifle Picture Thread

    I did a little research regarding this rifle and did some repair work to the stock. Apparently the LSR snipers as they left the factories (JP Sauer and Gustloff) were fitted with the optics/mounts as one of the last steps. The receiver was machined and the three drilled/tapped holes were done...
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