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  1. J

    Range Report Using different loads with the same weapon/zero

    Re: Using different loads with the same weapon/zero <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: armymedic.2</div><div class="ubbcode-body">i plugged in 10 inches in the offset and saw no change.......gotta be doing something wrong </div></div> If I plug in...
  2. J

    Range Report Using different loads with the same weapon/zero

    Re: Using different loads with the same weapon/zero <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LawnMM</div><div class="ubbcode-body"> Double edit - Brad, when punching in the offset for the secondary load, say its 1.2" low and .4" right, you need to modify...
  3. J

    Range Report Using different loads with the same weapon/zero

    Re: Using different loads with the same weapon/zero This is why some of my calculators have a "zero height" and "zero offset" so that you can account for the differences in zero position on the target for different loads. Brad
  4. J

    Range Report Making Ballistic Cards Using Density Altitude

    Re: Making Ballistic Cards Using Density Altitude I use FireFox and scale it appropriately (it's on the page setup tab from the File | Print menu). Brad
  5. J

    Range Report Making Ballistic Cards Using Density Altitude

    Re: Making Ballistic Cards Using Density Altitude <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: brasscow</div><div class="ubbcode-body"> Brad, Thank you for your response. Please forgive me for more questons - my background is not in mathematics or...
  6. J

    Range Report Making Ballistic Cards Using Density Altitude

    Re: Making Ballistic Cards Using Density Altitude <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: davide</div><div class="ubbcode-body">Brad... just to be sure.. in the field zero altitude I've to write zero, if I want to use DA in the following altitude field...
  7. J

    Range Report Making Ballistic Cards Using Density Altitude

    Re: Making Ballistic Cards Using Density Altitude <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Bryan Litz</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">why is jbm calling for more...
  8. J

    Range Report Want jbmballistics for PC

    Re: Want jbmballistics for PC <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: azimutha</div><div class="ubbcode-body"> I'm not saying that at all. I'm saying that calculating a Danger Zone is not useful for hunting because vital zones are small (even on an elk)...
  9. J

    Range Report Want jbmballistics for PC

    Re: Want jbmballistics for PC <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: azimutha</div><div class="ubbcode-body">I appreciate you going to the effort of adding this, Brad - but in a "know your limits" way. As far as hunting is concerned, I would consider the...
  10. J

    Range Report Want jbmballistics for PC

    Re: Want jbmballistics for PC Try it now. There are now inputs for "Target Height" and "Include Danger Space" (checkbox at bottom). Brad
  11. J

    Range Report Want jbmballistics for PC

    Re: Want jbmballistics for PC <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Bevan</div><div class="ubbcode-body">Brad, here's a question Can you add a 'killing window' column to the JBM trajectory calculator. Basically like the MPBR thing but for each...
  12. J

    Range Report 338 Lapua ballistic charts

    Re: 338 Lapua ballistic charts Please keep in mind that when you use the basic trajectory program for drop charts, they're really only good at the zero temperature unless you do what this article is talking about: Elevation This is the reason that my trajectory card programs were...
  13. J

    Range Report Want jbmballistics for PC

    Re: Want jbmballistics for PC <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Bevan</div><div class="ubbcode-body">I also want JBM for download because it's the only calc I have found (including several that you have to pay for, some quite expensive) that I like...
  14. J

    Gunsmithing 300 Norma Magnum gunsmiths

    Re: 300 Norma Magnum gunsmiths Not to hijack a thread, but can someone explain the difference between the 300 Norma Mag and the 308 Norma Mag? I didn't see anything on the 300 Norma Mag on their website. Is it a wildcat? The case capacities discussed make it sound a lot like the 308 Norma...
  15. J

    Range Report Calling all ballistics experts please!

    Re: Calling all ballistics experts please! I would suspect the velocity is low. I put out 175's a good bit quicker than that. As was previously stated, the drop from my website is about -23.7 MOA at 815 yards. I assumed a sight height of 2.0" and a velocity of 2715 f/s. One question, was...
  16. J

    Gunsmithing How to mount scope rail in a mill

    Re: How to mount scope rail in a mill I used to scope rings, a scope lapping tool and v blocks when I had to hold mine. I attached the scopes rings to the rail and lapping tool and then held it upside down between the v blocks. This gave me access to the bottom of the rail. It took more to...
  17. J

    Range Report Exclusive JBM user needs another program

    Re: Exclusive JBM user needs another program With the economy the way it is, find electronics is getting hard -- many of the parts that I need are not available when I need them (it's not like I'm ordering millions...). I've order the beta boards and will be a couple of months for those, so...
  18. J

    Gunsmithing Short Action Customs, LLC Shop pictures......

    Re: Short Action Customs, LLC Shop pictures...... Is that a South Bend Lathe in the back that I see? You can just barely see a headstock and leather/rubber (?) belt on it...
  19. J

    Range Report Methods for modeling temp variation for powders?

    Re: Methods for modeling temp variation for powders? Reloader 15. Both velocities were measured at the same time with the same chronograph.
  20. J

    Range Report Methods for modeling temp variation for powders?

    Re: Methods for modeling temp variation for powders? I have just measured it. Before I go to the range, I put 5-10 rounds in a sealed zip-loc bag and put them in ice water. By the time I get to the range, they're at freezing. I then quickly pull one round from the bag in ice water, throw...
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