Why do slug guns have such an extremely long twist rate? Wouldn't

>>31378298
>Wouldn't you want an extremely short twist rate to be accurate since there's so much mass your throwing?

some slug rounds have their own threading so they can be used in smoothbore shotguns.
shotguns ration aren't thigh because most of shotgun users use pellets and threading inside a barrel cause extreme spread when using pellets and so make the shotgun unable to be used against targets past ~20 meters.

battle rifle is an other case because of the speed of projectiles, assault rifles twist rate need to be tighter so the wind have less impact on the round ( wich is lighter than battle rifles bullets ) while for battle rifles it's not neccessary since the round has enough mass, speed and twist to travel without so much problem

handgun have enough twist rate so their rounds can be used for a short range engagement with great ballistic.


to make it clear
>not everything is about accuracy also firearms and ballistics are complicated as fuck

>>31378298
Bullet stability is primarily determined by the bullet's length relative to its diameter. Longer for diameter bullets require faster twists.

Shotgun slugs are extremely short for their diameter so don't need much twist to stabilize. Most "battle rifles" are 0.308 bores and a 1-10" twist will stabilize almost all bullets in that bore size and definitely all issued ones.

TDP built ARs have high twist rates due to some niche military bullets that need 1-7" to stabilize. 1-8" will cover anything a civilian can fit into the mag.

>>31378298
you want a bullet to spin but it can spin too fast. The mass of the bullet isn't perfectly in line with the barrel nor the aerodynamic center. With really expencive stuff it will be closer. but that is why a bullets will have a sweet spot in twist rate.

>>31380850
Bullets don't have a sweet spot in twist rate please stop repeating this fuddlore.

>>31378716
>some slug rounds have their own threading so they can be used in smoothbore shotguns.


those rifled slugs literally do nothing better than a normal slug.

At best they provide a small squishy window to fit through a full choke.

>>31380878
Yes they do.
Too slow isn't good.
Too fast isn't good.
The in-between is the sweet spot.

Because you're trying to spin a 600gr 3/4" diameter slug, and centripetal acceleration is trying to rip it apart.

>>31380878
What is long range twist rate selection and bullet stabilization?

>>31380900
No, they don't.

Too fast and they'll detonate, but that typically suggests shitty bullet construction. The idea that rifle bullets could be 'overspun' and adopt a nose up attitude at long ranges, is fuddlore that has been repeatedly shown to be false by doppler testing as well as actual results on targets.

There 0 evidence that twist rate needs to be matched to bullet length (though most idiots claiming you need to go by weight, further proving their ignorance).

>>31380923
What?

The bullet is either stable or it is not. Beyond the point at which it is stable spinning it faster has no impact on ballistic performance.

>>31380963
Some say overstabilization is an issue. Ive yet to actually see any evidence either way though.

>>31380826
Thank you

>>31381016
Some people believe that a race of alien lizards controls world governments.

Overstabilization was adopted from artillery projectiles where is actually is a problem. Rifle projectiles simply don't perform the same way and loads of testing has borne that out.

>>31381076
Do you have any evidence or a source to back up that claim or is everyone supposed to take your word because everyone on/k/ is an idiot except you?