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  1. B

    Runout with FL sizing. Any help?

    Mr. Baggins, what caliber is that rifle? That 34.7 group is a 1 or a big 0? The middle 34.5 group is a big 1 or a small 2? What class are you shooting?
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    Runout with FL sizing. Any help?

    So ... let's put a stake in the ground. Does neck or bullet runout matter?
  3. B

    Runout with FL sizing. Any help?

    Tony was pretty good at the whole shooting thing.
  4. B

    Runout with FL sizing. Any help?

    Tony Boyer wrote about runout in his book. As far as he was concerned, it was "not a problem". But, that was some year back. If you have a gun, ammo, shooter, and conditions to shoot 4 zeros then maybe runout will matter.
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    Hornady or RCBS micrometer bullet seating tool?

    I have never heard of anyone breaking a sizing die. What fails? Do the threads shear off? Does the die body crack? Is this failure associated with insufficient case lube?
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    Runout with FL sizing. Any help?

    Make 20 rounds. 10 rounds with zero runout and 10 rounds with 0.005 runout. Shoot them. Can you see the difference on paper? If you can't see a difference on paper then you are trying to solve a "not-a-problem". For me, this is not-a-problem but your mileage may vary.
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    OCW Guys… help me read these!

    On Friday, I shot a 5-shot group at 100. There were 4 in a little group - probably a 3, I didn't bother to measure it - with one shot (same elevation) that went left just out of the group. I know that some idiot wasn't paying attention when he shot that flyer. I know because that charge...
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    Handloading log app reccomendation.

    old school: 3-ring binder, lined paper with reinforced holes and a pencil. I track original shoulder, sized shoulder length and the shim required to make that happen. The sized neck, expanded neck ID, and the expander. Fired case length, trimmed-to length and the shim it took to make it...
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    OCW Guys… help me read these!

    In a run of larger groups, you can accidently get a small group - but its neighbors call it out for what it is -- accident. On the other hand, a run of small groups is improbable and is - in my opinion - more likely to be telling you something.
  10. B

    Almost new rifle - groups spread horizontal

    Assume a 308 with FGMM. A headwind at 1 o'clock running from dead calm to 10 mph will give you just over 0.3 mils. A 10 mph headwind switching from 11 o'clock to 1 o'clock will give you almost 0.2 mils. In my experience fishtailing headwinds are very hard to estimate. Give me a 20 mph...
  11. B

    Almost new rifle - groups spread horizontal

    or a weather report.
  12. B

    What Brand of Brass for an Accurate AR10?

    Consider Lake City 308. It is reasonably cheap and available and it is pretty tough. In my experience primer pockets last quite a while.
  13. B

    Reamer freebore and reloading

    Regardless of bullet, my max COL is what will fit into my magazine and reliably function. If you single-load, you are not constrained by that limitation. A very short bullet might be just barely seated in the neck, but that won't work. When you chamber the round, the bullet is knocked all...
  14. B

    What Brand of Brass for an Accurate AR10?

    It says "crimped primers". Can be fixed but an extra step.
  15. B

    Garmin Chronograph - calibration?

    Because I like all of my measurements to agree. The more, the merrier. When I have a measurement that doesn't agree, I get nervous that the new one is right and all of the other ones are just accidently close to right. I have a lot of experience with developing theories and then using them...
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    Garmin Chronograph - calibration?

    The drop depends on the gravitational constant and flight time - S = 1/2AT**2. Flight time between any two points on the trip depends on initial velocity and drag. We have devices to compute that, I also carry printed trajectory tables. And we have angle measuring devices mounted on our rifles.
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    Garmin Chronograph - calibration?

    I get a 100 yards zero, I usually slip turrets. Then I shoot at 200 yards until I am on then I write down the scope elevation above the 100 yard zero - say +.4. Then I shoot at 300 until I am on then I write down the scope elevation above the 100 yard zero - say +1.2. Repeat until I get to...
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    Garmin Chronograph - calibration?

    You guys are going to a lot of trouble to tell me that my technique for estimating velocity won't work. Well, too bad. It has been working for me for about 20 years with every gun I have used it with. I haven't taken a chronograph to a range in forever and regularly I make cold bore 800 yards...
  19. B

    Garmin Chronograph - calibration?

    Apparently I didn't explain my "without a chrono" process - it involves shooting. 1. shoot and adjust until your have a 100 yard zero - slip or not, up to you. 2. shoot 200, adjust scope until point of aim equals point of impact. Write down your scope setting. 3. shoot 300, do like 200...
  20. B

    Garmin Chronograph - calibration?

    I developed a load without a chrono - I just shot for accuracy and used the elevation measurements from the scope to determine velocity. Using that technique, I figured that my velocity was about 2725 fps. Last Sunday I was out with a buddy. He had a Garmin chronograph. I placed it next to...
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