Journalists and scientists should be rigorous about fact checking themselves. If you want respect or to be taken seriously don’t make stupid statements that could easily be fact checked.
Here is one recent example (link):
Really?
A projectile from a sling as deadly and having the same stopping force as a .44 Magnum?
I seriously doubt that. But you see this is where fact checking comes into play. Rather than just discount this on face value let’s see what the facts say.
In the article itself the ballistic stats for a .44 Magnum are shared
Velocity: 1475 fps (450 meters/second)
Energy: 1,160 fps (1,570 joules)
One relevant piece of information for this equation is missing, the weight of the projectile. So, I can’t exactly fact check those specific numbers. What I can do is (gasp) a little research on my own. Something every journalist and scientist should do for themselves.
Hornady’s .44 Magnum XTP load gives the following information (link):
Projectile Weight: 240 Grains
Velocity: 1350 fps
Energy: 971 ft/lb
I verified these numbers using a third party ballistic app (link) and they are correct. This is a little less than the stats shared in the article so let’s look at a more powerful loading, the Heavy Magnum .44 +P+ from Buffalo Bore (link):
Projectile Weight: 340 Grains
Velocity: 1425 fps
Energy: 1533 ft/lb
Again, I verified the math myself using the ballistic app. So, the data in the article on the power (energy) of a .44 Magnum is within the realm of possibility, even if they don’t share all the relevant data.
So, how about these super powerful Roman slings? Other than claims of being as powerful as Dirty Harry’s round of choice they don’t take the trouble to share any of the math that lead to this conclusion. So, we will have to do a little legwork based on what they did share.
Note: I am sure they did this and didn’t just make something up, that would be unethical for scientists and journalists, right?
In the article is states that the projectiles could reach up to 100 mph and weighed around 30 grams. So, now we need to do some conversions so we can compare apples to apples.
100 mph = 147 fps (rounding up to give the “smart people” the benefit of the doubt)
30 grams = 463 grains (again rounding up)
Going back to our handy dandy ballistic app we plug these number in and calculate the energy.
Drumroll please!
22 ft/lbs
Now, I am too old to have been taught all the fancy, dancy new math, but back in the stone age 22 wasn’t anywhere close to 971 (on the low end), 1160 (provided in the article or 1533 (on the high end).
So, what cartridge would the slingshot compare to in power?
None…
Even the .22 Long Rifle clocks in around 1235 fps with a 40 grain projectile delivering 140 ft/lbs of energy which is over six times more powerful than the sling fired projectile. Even the lowly .25 ACP, the lowest powered cartridge I could come up with clocks in at 900 fps with a 35 grain projectile and 63 ft/lbs of energy. Still almost three times the energy of the sling powered projectile.
Hardly, a weapon that would “take the top of your head off.”
Two key takeaways here:
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- Always fact check what your data, especially if you are a scientist or journalist
- Never bring a sling to a gunfight
Take care and God bless!