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A comment on At 4.4 miles, Wyoming team sets new rifle shot world record. Parent comment

Re:At 4.4 miles, Wyoming team sets new rifle shot world record by akerl_ on Friday September 23, 2022 @06:14PM (#32957736)
Just to clarify, I'm pretty sure they're saying that the bullet left the muzzle at 3,300 fps and had decelerated down to 600 fps at time of impact, not that it was moving vertically at 600 feet per second. So the fact that it was moving faster than a BB gun isn't really shocking.
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Re:At 4.4 miles, Wyoming team sets new rifle shot world record by mod on Friday September 23, 2022 @06:29PM (#32957847)
After four miles, it's a little shocking to me.

And I'm into shooting sports.

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Re:At 4.4 miles, Wyoming team sets new rifle shot world record by Alupis on Friday September 23, 2022 @07:40PM (#32958365)
> ...of a 422-grain copper bullet...

> The shot was made with a custom-built rifle chambered for the .416 Barrett cartridge

That's a huge bullet that was specifically designed for low-supersonic drag and extreme long range. It has a huge amount of energy at the muzzle... (8,767.4 ft-lb or 11,887 J according to wikipedia[1]) so ~600fps down range, even at 4.4 miles, is not that surprising.

The only surprising feat here is they managed to actually hit a target... which is quite incredible.

[1] https://en.wikipedia.org/wiki/.416_Barrett

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Re:At 4.4 miles, Wyoming team sets new rifle shot world record by NaturalPhallacy on Friday September 23, 2022 @08:43PM (#32958746)
For the non-gun people in here that is an absolute chonker of a bullet.

The .556 (very common AR round) is 112. 9mm common in handguns is around 115.

422 grain = 27.35 grams / 0.9646 ounces.

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Re:At 4.4 miles, Wyoming team sets new rifle shot world record by OJFord on Saturday September 24, 2022 @07:14AM (#32961470)
> .556

Do you mean 5.56mm, the NATO standard small arms round iirc? i.e. as an imperial measurement it'd be about the same as a .22, not .556.

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Re:At 4.4 miles, Wyoming team sets new rifle shot world record by NaturalPhallacy on Sunday September 25, 2022 @02:19PM (#32974276)
Yeah. lol, I was thinking about how it's said "five five six" and paid no attention to what I wrote.
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Re:At 4.4 miles, Wyoming team sets new rifle shot world record by mburee on Saturday September 24, 2022 @12:37PM (#32964247)
0.556 cm ;)
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Re:At 4.4 miles, Wyoming team sets new rifle shot world record by OJFord on Saturday September 24, 2022 @07:46PM (#32967632)
... touché!
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Re:At 4.4 miles, Wyoming team sets new rifle shot world record by bjt2n3904 on Friday September 23, 2022 @09:34PM (#32958999)
5.56 is 45 - 75 gn, typically 55 or 62.
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Re:At 4.4 miles, Wyoming team sets new rifle shot world record by mrb on Saturday September 24, 2022 @12:21AM (#32959710)
Doing the exact math, a 422-grain bullet shot at 3300 feet/sec is 13,833 joules of kinetic energy (.5 * mass * speed*2 = energy)

Right before hitting the target it slowed down to 600 feet/sec, meaning it lost 97% of its kinetic energy during the flight.

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Re:At 4.4 miles, Wyoming team sets new rifle shot world record by mod on Friday September 23, 2022 @08:55PM (#32958802)
> BC (Ballistic Coefficient) ≈ 1.103

Wow.

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