Ammoguide cartridge challenge!


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jsalcedo
March 10, 2004, 01:18 PM
THE AMMOGUIDE "CARTRIDGE CHALLENGE"
- Test your cartridge/reloading knowledge
- Lots of fun
- Learn a lot about ammo as you play
- Ongoing site game/competition - regular new installments
- Get your username listed on the homepage Hi-Score lists!
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Got a 108 76%

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pignock
March 10, 2004, 03:49 PM
nice test - I got an 88% with a score of 133

Mike Irwin
March 10, 2004, 06:55 PM
92% correct, score of 152. Should have had a perfect, but I clutched on two that I KNEW the answers to. I'm such a dumbazz!

Mike Irwin
March 10, 2004, 06:56 PM
Cool! I'm also in first place.

I wonder if I can get extra credit if I point out a couple of glaring typos... :)

Cosmoline
March 10, 2004, 07:22 PM
Gets tough toward the end! Nice quiz. I was going strong but fumbled on a few big ones and ended up at 76% . That's not a bad score for this quiz! I had a problem with one question, but otherwise they were pretty fair.

Cosmoline
March 10, 2004, 07:26 PM
Looks like they're going to have future tests. Hopefully the next one will feature more obscure European military loadings so I can raise my ranking.

Balog
March 10, 2004, 07:53 PM
I got 76.0% correct with a score of 120. I'm #9 overall, but second in average score.

Is it just me, or did that test seem to talk a lot about Weatherby's?

Frohickey
March 10, 2004, 07:57 PM
I got an 80%. My kung-fu is no good. :(

The questions that got me were the Japanese Arisaka, Roy Weatherby's first cartridge, most energy between 223, 762russian, 30-30, 357mag, 8mm Rem Mag claim to fame, and one other I forget.

Cosmoline
March 10, 2004, 08:06 PM
Lots and lots of Weatherby questions. Which kinda messed me up seeing as how I know almost nothing about those rifles. I've gone up to them, looked at the price tag, and backed away slowly.

Give me questions about the 8x57J or the 7.65 Argentine and I'm golden, though.

Balog
March 10, 2004, 08:11 PM
Yeah, and not only were there a lot of questions about Weatherby, but he included a couple remarks in non-Weatherby questions about the company. Weird.

Gewehr98
March 10, 2004, 08:53 PM
But those darned Weatherby questions. Aargh!

Mal H
March 10, 2004, 09:37 PM
I'm number 3! I'm number 3!

To quote Phil Hartman, "Oh well, nothing wrong with being adequate."


One I missed was the big bore energy question. They said the .460 Weatherby Mag had more muzzle energy than a .600 NE by 1,000 ft-lbs. I disagree.

jsalcedo
March 10, 2004, 10:04 PM
460 Weatherby mag 500 grain at 2650fps for 7799 foot pounds


458 Win mag 500 grain at 2350 for 6133 foot pounds


600 nitro express 900 grain at 1950 for 7596 foot pounds

577 tyranosaur 750 grain at 2450 for 10240 foot pounds

Mal H
March 10, 2004, 10:09 PM
Right, not even close to 1,000 difference and those figures are for reloads for the .460 WM. Factory rounds are much closer, and I still think the .600 will win.

cdbeaver
March 10, 2004, 10:45 PM
I tied with Mike with two misses. Makes me feel REALLY brainy (for a brain-dead old fart).

Missed the questions on .270 Weatherby and the 8 mm Rem magnum.

Mike Irwin
March 10, 2004, 11:12 PM
Cartridges of the World, 4th edition...

.458 Win. Mag., most powerful factory load shown is 4,740 ft. lbs with a 350-gr. bullet.

.460 Wby. Mag., most powerful factory load shown is by Weatherby, 7,507 ft. lbs.

.500 Jeffrey, most powerful factory load shown is 6,800 ft. lbs.

600 Nitro, most powerful factory load shown is 7,600 ft. lbs.

Mal H
March 11, 2004, 12:18 AM
Alright! The .600 NE is more powerful than the .460 WM.

I want my money back!
Excuse me? What's that? ... oh ...

Uh, nevermind.

glockten
March 11, 2004, 01:32 AM
96%/148.

Yeah, I missed the .460/.600 question too.

Sam
March 11, 2004, 01:58 AM
I was a bit perturbed. Got bit by the weatherby questions. 140 and 6.4 Yuck!

only1asterisk
March 11, 2004, 02:05 AM
153, but the question I missed I need to check on.

David

cracked butt
March 11, 2004, 05:03 AM
136 and 5.9

MikeHaas
March 24, 2004, 03:32 AM
It's time for Cartridge Challenge II... just posted a new suite of questions.

Enjoy.

http://ammoguide.com/cgi-bin/myag.cgi


Mike Haas

elkhunter
March 24, 2004, 06:21 AM
143 and 5.3. Number 24. Not quite sure how I pulled that off.

Gunfyter
March 24, 2004, 04:10 PM
Currently 13th place.

Balog
March 24, 2004, 08:25 PM
After taking the second:

74.0% 222 6.0 4.4

Currently in 15th place.

Gewehr98
March 24, 2004, 10:31 PM
12th place. ;)

Ironbarr
March 25, 2004, 01:36 AM
I had the right answer, but am confused re the text:Lastly, the shooter will not hear a detonation if the resultant pressure was insufficient to push the bullet all the way down and out of the barrel. One only hears report if the bullet exits the barrel. Accordingly, in the event of an apparent misfire, the shooter should always insure that the bullet didn't become lodged in the barrel because of partial detonation and insufficient pressure. Naturally, trying to subsequently pass a bullet with a normal, full-power charge down such a blocked tube will result in catasrophic failure of the firearm and possible harm to the shooter. Now, how do you handle this - wait 10 or more seconds and hope when you clear that the situation doesn't go squirrelly?? Assuming there is a burn of sorts, where does (did) all that pressure go if the barrel's jammed and the bolt is locked?

Inquiring minds want to know.

-Andy

MikeHaas
March 27, 2004, 07:48 AM
>Now, how do you handle this - wait 10 or more seconds and hope when you clear that the situation doesn't go squirrelly?? Assuming there is a burn of sorts, where does (did) all that pressure go if the barrel's jammed and the bolt is locked?


Really good questions.

My experience comes from squib loads in revolvers where the cylinder gap obviously vents pressure whether the bullet makes it out or not. (Except in the Nagant gas-seal revolver :-)

But we can probably make a safe assumption that if the bullet didn't make it down the barrel, there was insufficient pressure to push it. The next thing we can probably assume is that the low pressure condition must be seriously low, not just a little bit low. I say this because in a general sense, bullets are pushed through barrels with considerably less pressure than what a high-power bolt action rifle generates (50,000 - 65,000 psi) - some handguns are in the range of 5,000 psi or so.

Ok, but your question is still valid - assuming some kind of low pressure failure causes the bullet to be pushed part way down the barrel and stop. Depending on the velocity attained, the bullet will have built up some inertia (or kinetic energy) that will want to carry it farther down the bore than the propellent expansion alone would carry it. This will tend to lower the pressure below the point when expansion stopped.

So... the point is, it wouldn't seem you could logically have too much pressure in this situation. In fact, if the case doesn't expand sufficiently to seal in the chamber, what little pressure is generated would vent there. Sometimes in low pressure situations, the primer is forced rearward (because it isn't expanded against the primer cup walls). and gas can leak through that point.

But... if it doesn't leak, and remains contained in the chamber, it probably still isn't that dangerous. Any significant pressure will lock the bolt lugs tight - you won't be able to open the bolt manually. If you can open the bolt, there probably isn't enough pressure to speak of.

Anyway, those are my thoughjt on your excellent scenario.

Mike Haas
http://AmmoGuide.com/

only1asterisk
March 27, 2004, 08:03 AM
Mike,

More questions! I need to redeem myself after my poor showing on the last set. Maybe less tricky but more difficult?


David

Gewehr98
March 27, 2004, 12:34 PM
Namely, those Weatherby Magnum questions last time? As you saw, there was more than one way to skin a cat, ballistically. ;)

MikeHaas
March 27, 2004, 06:48 PM
Glad you like the Challenge! (and hope you like the website redesign too - feedback very appreciated)

You bet we'll add more questions, hope to put out a set every 2-4 weeks (but probably won't be able to next until after the NRA convention Apr 15-18).

Sorry you have to wait to regain the top slot, but patience... think of Carlos Hathcock... :)

Mike Haas
http://AmmoGuide.com/

MikeHaas
March 27, 2004, 07:06 PM
As far as the Weatherby questions, I plead guilty. But it's your fault for being so smart - I have to pull out the "big guns". :p

Mike Haas
http://AmmoGuide.com/

Snowdog
March 27, 2004, 07:06 PM
I got a score of 212... some of those questions were tough, but most were give aways.
Unfortunately, I missed a couple of those give aways by misreading the questions. :o

Currently listed at #30, but I won't complain.

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