Which gun myth(s) did you used to believe?

[Deus Machina]

How does a round "jump crimp???" Perhaps I should ask what is the "crimp" that was being jumped?

Once a bullet is pressed into the casing, the mouth of the case is pressed to roll (roll crimp, common for revolver rounds and more pronounced) or squeeze (taper crimp, for rounds that space against the case mouth instead of the rim) slightly inward, tightening it against or crimping it into a groove in the bullet. More so on revolver rounds for specifically this reason.
"Jumping crimp" happens when the gun recoils, moving everything--including the casing--back, but the bullet itself tries to stay in place, scooting forward and partially out of the brass.
Jump it far enough to protrude from the cylinder face, and it can't rotate. If it happens in the wrong spot, you can't even open the cylinder.
Congratulations, you just locked up a revolver.

Obviously this happens more to lightweight guns like my Taurus 85 UltraLight, and is rare for weighty, forward-heavy guns like a S&W 586.
It's exceedingly rare for semi-autos, aside from the Bond Arms Bullpup 9, which feeds by pulling a round out the back of the magazine--and can occasionally yank the case right off the bullet.

 

[Pahonix]

50 cal can take your head off without actually hitting you.

 

[Spats McGee]

I'll play:
1. That 9mm is too weak for SD;
2. That the sound of a pump action shotgun will scare most intruders away*; and
3. That the .45 acp will blow a man's arm clean off.

I'm sure there are more, but those are the only three that jump to mind.

*= I will admit that the sound of a pump action shotgun would scare me away, but I'm not most intruders.

 

[JR24]

2. That the sound of a pump action shotgun will scare most intruders away*; and

I will say I had a buddy in college who scared off a couple burglars with racking a shotgun.

Then again it was a couple drunk stupid college kids, so I'm sure wandering out and saying Boo! Would have done it too.

 

[Tommygunn]

Once a bullet is pressed into the casing, the mouth of the case is pressed to roll (roll crimp, common for revolver rounds and more pronounced) or squeeze (taper crimp, for rounds that space against the case mouth instead of the rim) slightly inward, tightening it against or crimping it into a groove in the bullet. More so on revolver rounds for specifically this reason.
"Jumping crimp" happens when the gun recoils, moving everything--including the casing--back, but the bullet itself tries to stay in place, scooting forward and partially out of the brass.
Jump it far enough to protrude from the cylinder face, and it can't rotate. If it happens in the wrong spot, you can't even open the cylinder.
Congratulations, you just locked up a revolver.

Obviously this happens more to lightweight guns like my Taurus 85 UltraLight, and is rare for weighty, forward-heavy guns like a S&W 586.
It's exceedingly rare for semi-autos, aside from the Bond Arms Bullpup 9, which feeds by pulling a round out the back of the magazine--and can occasionally yank the case right off the bullet.

Thanks for the explanation. I've heard of bullet set-back in semiauto guns, but I don't believe I've ever heard of this situation in a revolver. I guess no one is ever too old to learn something new.

 

[JR24]

Thanks for the explanation. I've heard of bullet set-back in semiauto guns, but I don't believe I've ever heard of this situation in a revolver. I guess no one is ever too old to learn something new.

Primers can walk out of the pocket and bind up the cylinder on revolvers as well, had that happen a few time.s

 

[.308 Norma]

Primers can walk out of the pocket and bind up the cylinder on revolvers as well, had that happen a few time.s

Oh, yeah. Bought myself a genuine Colt SAA .44-40 a few years back. Every time I tried to use that less-expensive (and low power) "cowboy" ammo in it, the primers would back out and bind up the cylinder tighter than tight. And finding "more powerful" (actually just standard power) .44-40 ammo around here was difficult. I had to develop my own standard power .44-40 loads to keep the primers from backing out.
I've experienced the same thing with that Speer .38 Special, plastic "target ammo" - the stuff that has plastic cases and plastic bullets, and only uses primers for propellant. I don't even know if Speer makes that stuff anymore, but it never worked for me - almost every time I fired a round of it, the primer would back out and tie up my revolver's cylinder.

 

[tark]

Ball powder was the problem - myth

This is contrary to everything I have read and heard. Can you provide evidence proving it is a myth?

Tumbling bullets - myth

Not in flight, but M-193 bullets usually break apart, or flatten, when hitting flesh, Then they go all over the place in the body.

Bouncing off twigs - myth

Of course they don't "Bounce off of twigs" but they can be deflected from their flight path.

Stoner made it right, the Army screwed it up - myth

Stoner was a pioneer in using unconventional materials in weapons construction. Whether or not he "Got it right" isn't for me to say, but Stoner left Armalite in a huff when the Army added that forward assist to the gun. He was dead set against it. At least that's what the books in the Arsenal Museum's archive section say. The Arsenal Museum has one of the original prototypes of the F/A on display. It is a crude, cobbled together contraption. Note the green stocks on the very early guns. These guns have the early 1-14 twist barrels.

 

[memtb]

That AR platform rifles were not accurate. After my wife brought home a DPMS stainless 16” bull barrel from an NRA Banquet.....I was very pleasantly surprised.

I scoped it, loaded it with some hand loads for my bolt gun. Even with a trigger pull resembling that of pulling a rusted chain up across a 90 degree edge.... at 100 yards, it went 5 rounds that could be covered by a quarter. Since that first outing, it now has a Timney Trigger and other minor accuracy enhancing work....I feel pretty comfortable with it! memtb

 

[JR24]

That AR platform rifles were not accurate. After my wife brought home a DPMS stainless 16” bull barrel from an NRA Banquet.....I was very pleasantly surprised.

I scoped it, loaded it with some hand loads for my bolt gun. Even with a trigger pull resembling that of pulling a rusted chain up across a 90 degree edge.... at 100 yards, it went 5 rounds that could be covered by a quarter. Since that first outing, it now has a Timney Trigger and other minor accuracy enhancing work....I feel pretty comfortable with it! memtb

I also believed that until I decided to learn an AR. Now I actually prefer them to my bolt guns, even my M&P with it's "mil spec" (uh huh) trigger will shoot 1/2" @ 100 with good ammo if I do my part.

If I'd have had ammo and a chance to really learn it I was planning on putting a nice trigger in my 6.5 Grendel build, but these days I'm just hoarding what little ammo I have for it.

 

[CraigC]

That the .45Colt delivered greater performance at less pressure, handled heavier bullets and penetrated better than the .44Mag.

Cleaning guns every time they are fired is the only way.

 

[GEM]

You can't protect yourself with a 22LR.

All guns fights are 3,3,3

 

[ACES&8S]

The results of a homemade ballistic test, for science project in 1967, would be ok 54 years later

 

[SwampWolf]

That the last gun I bought would be the very last one I'd buy.

 

[.308 Norma]

The results of a homemade ballistic test, for science project in 1967, would be ok 54 years later

Sorry ACES&8S. I'm not laughing at you though. I would have probably believed the same thing in 1967 - when I was 19.
High schools, in fact all schools have changed a bit in the last 50 years. I hope you at least got an "A" on your science project.

 

[GEM]

All Glock models are so reliable right from the box.
(the original 9mms are - the rest, well, don't ask me - sigh).

 

[Dibbs]

The dimes in a shotgun shell came out of some old western movie I cant recall the name. The fellow with the shotgun lets fly and then says "the best two bucks I ever spent"

Emilio Estevez, playing William Bonney(Billy the Kid). in Young Guns...

 

[d2wing]

I heard many Viet-Nam vets talk about how the enemy used "tumbling" bullets and that they could use our ammo but we couldn't use theirs. In other conflicts around the globe, enemy combatants would turn their rear sights up to maximum yardage to increase the power of the bullets they were firing. The biggest myth of all is that if you buy just one more gun, you will have enough!

I remember being told that commies could use our ammo but we couldn't use theirs when I was in the army. And that you could kill a man by shooting him in the arm with an M-16.

 

[GEM]

You can get folks to bleed out with enough arm damage - just saying.

 

[Rex in OTZ]

French rifles are junk.
Italian Carcano's were worse.
Japanese Arisaka type 38 and 99 rifles were even worse than Carcanos or MAS rifles.

Even worse than a Japanese rifle was a Communist Rifle.
Red Commie guns are the lowest of the low.

Having owned french, Italian and communist arms soon diproved the crappy weapons noise I heard before.
I never ownwd a airsaka but did get to shoot one.
The one japanese type 38 I experenced and shot, was as good a rifle as any other 5 shot 6.5mm bolt action in ww2.

 

[BlueHeelerFl]

The dimes in a shotgun shell came out of some old western movie I cant recall the name. The fellow with the shotgun lets fly and then says "the best two bucks I ever spent"

 

[Shanghai McCoy]

Emilio Estevez, playing William Bonney(Billy the Kid). in Young Guns...

It shows up in an earlier movie where Kris Kristofferson portrays Billy as well.

That video was interesting and, while he mentions the silver dimes for vampires, I wonder if the old silver dimes were much heavier and how that might effect the ballistic co-efficiency of coinage..?

 

[GEM]

That silver affect vampires. It's werewolves! BTW, iron shot for the Fey - they can't stand cold iron.

 

[JR24]

That silver affect vampires. It's werewolves! BTW, iron shot for the Fey - they can't stand cold iron.

Yeah, you need wood, possibly oak, for vampires. Guess some kind of flechette shotshell would be needed, awful close range probably.

I'm sure demolition ranch has a video on it somewhere. Probably.

 

[BlueHeelerFl]

That silver affect vampires. It's werewolves! BTW, iron shot for the Fey - they can't stand cold iron.

That depends on the source, such as the Blade movies were silver effects vampires as well.

And I want to say vampires don't cast reflections on mirrors cause the original mirrors were silver