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About TJC

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  1. TJC

    Big problem with new rifle

    The rifle passed the Proof House right ? Check your brass. It sounds like you fired it in another rifle and think you’ve sized it. Have you tried new brass ?
  2. CCI 450 Small Rifle Magnum Primer
  3. Run your finger over the other primers. If any are sharpish to the touch then it probably confirms the load is too hot.
  4. TJC

    6.5 creedmoor and RS62 temperatures

    Very interesting. Is RE16 a double-based powder ? Temp sensitivity looks excellent but just wondering if it is double based / how they get such good velocity ? Thx
  5. TJC

    6.5 creedmoor and RS62 temperatures

    Thx. N550 is 1.00 so not really a great option for temp sensitivity
  6. I’m getting out to almost 5000 yards ! Crazy.
  7. TJC

    Spotting scope

    https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F143258633577 I’m selling this
  8. TJC

    Vortex prices

    I’m gonna guess a link error. The Horus is always more expensive than the 2C so for them to be the same price is very unusual.
  9. TJC

    Velocity plateaus in load testing: Why?

    Scott Satterlee is doing a course in the U.K.... https://m.facebook.com/roundhousefirearmstraining/
  10. It’s a debate. Enjoy it. You could be 100% right or I could be. What we can probably agree on is that neither of us will ever be able to prove it on the range. I’m certainly not a good enough shooter for it to matter.
  11. If it is basic and maths why do different apps account for it differently ? I love Brian’s work and follow him religiously but he’s saying we need a custom curve for bullet, he’s saying spin drift is more than many other ballisticians and he’s saying coriolis matters....and he’s selling software to measure and compensate for these. The truth is the best shooters in the word don’t use it and we all know in our sport everyone chases performance the the enth degree. If it made a difference at the enth degree shooters would embrace it religiously. You need to ask yourself why they don’t. PS I don’t they think are flat earth examples at all. They are simplistic for sure but they make sense don’t they ? The earths atmosphere moves with the earth. Outside of the atmosphere coriolis does exist, is extremely material but for the few seconds of bullet flight it doesn’t matter. Its super interesting but the reality is nobody has ever conclusively proved it matters for our sport. That in itself is interesting. There is argument and debate but if it is as simple, calculatable and basic physics as you say then why is there so much debate and discussion ? Is it because shooters have and haven’t seen the difference after firing billions or rounds downrange ?
  12. Jacob gives a very simple example of Felix Baumgartner, that guy who jumped from space. He took several hours to ascend to the edge of the atmosphere at 128k ft and then jump back to Earth in free fall for almost 5 minutes. Where did he land...pretty much exactly where he took off from. How is that possible if the earth is rotating around it’s axis at 1,000 MPH. The Coriolis Effect says he should have landed in the Pacific Ocean but he didn’t. In the two hours he took to go up the earth moved 2,000 miles (actually less because he wasn’t on the equator). Now think about a bullet. It doesn’t stay airborne for more than a few seconds and it doesn’t go that high either. The earth’s atmosphere moves with the rotation of the earth. If coriolis mattered and I wanted to travel from London you Cardiff I would hire a helicopter and hover. The 150 miles would close in 10 minutes or so and all I would have to do is hover 25 feet above the ground. If the earth moves at 1,000 mph how can an airplane travelling at 500 mph from say Madrid to Tel Aviv ever arrive ? It’s because the atmosphere is travelling at the same speed as the earth. If it wasn’t, we would have constant cyclones.
  13. Says most of the leading precision rifle instructors and top competitors. It’s actually common knowledge that most turn off this feature. Attend any high quality course and this topic comes up time and again. If you are genuinely interested have a listen to this podcast by Jacob Bynum who is widely regarded as one of the most respected instructors in the world. He gives some amusing examples why coriolis doesn’t matter in shooting. https://itunes.apple.com/gb/podcast/gear-tasting-radio/id1203483156?mt=2&i=1000433535484
  14. You shouldn’t account for it because ballistic apps grossly over-calculate the impact. That is why most shooters turn off the coriolis calculation on their Kestrels.

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