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Help dispell a rumor: Ammo has greater penetration at further distances
Posted on 5/17/12 at 12:10 pm
Posted on 5/17/12 at 12:10 pm
So I've seen a rumor that a rifle can penetrate further into material at say 100m than at 15m. Any truth to this? Can only think it has to do with hardening of the shell while it is cooling in mid air. Any links would be helpful. Thanks.
12
Posted on 5/17/12 at 12:12 pm to C
That's dumb. F= ma
Posted on 5/17/12 at 12:12 pm to C
Should be a good discussion. Sounds like a bs rumor to me.
Posted on 5/17/12 at 12:12 pm to KingRanch
False. Opposite actually. Its constantly slowing.
Posted on 5/17/12 at 12:15 pm to Langston
quote:
Its constantly slowing.
yeah I know that. This is strictly about penetrating a solid object like reinforced concrete, not force transfer.
Posted on 5/17/12 at 12:15 pm to Langston
I think it is definately false.
The thought behind it I'm guessing is that at slower speeds the bullet would hold together better therefore more mass = better penetration?
The thought behind it I'm guessing is that at slower speeds the bullet would hold together better therefore more mass = better penetration?
Posted on 5/17/12 at 12:15 pm to C
False. At a further distance the bullet actually disintegrates.
Posted on 5/17/12 at 12:18 pm to Slickback
This would be simple to field test.
Posted on 5/17/12 at 12:19 pm to C
force of object in motion is mass x velocity squared
air resistance reduces velocity while the mass stays the same.
objects struck with less force will suffer less destruction in general.
However, if an object is moving with enough force at impact, it may fragment into smaller pieces with less mass and thus each has less force after impact.
There are many variables involved in the fragementation and deformation of a projectile. Unless there is a reduced force at which a particular projectile has a lower fragmentation or deformation rate than it does when at the higher force of full muzzle velocity, penetration at close ranges would be higher.
unless I am missing something.
air resistance reduces velocity while the mass stays the same.
objects struck with less force will suffer less destruction in general.
However, if an object is moving with enough force at impact, it may fragment into smaller pieces with less mass and thus each has less force after impact.
There are many variables involved in the fragementation and deformation of a projectile. Unless there is a reduced force at which a particular projectile has a lower fragmentation or deformation rate than it does when at the higher force of full muzzle velocity, penetration at close ranges would be higher.
unless I am missing something.
Posted on 5/17/12 at 12:23 pm to C
Very false
Posted on 5/17/12 at 12:26 pm to Bleeding purple
Good explanation BP
Posted on 5/17/12 at 12:33 pm to KingRanch
So do you plan on running away from the deer before you shoot it? 
It is important to know what type of bullet we are talking about. If there are any instances where this is true I would imagine that you would need to specify the speed of the projectile at the barrel as well as what type of bullet is being shot.
I can only imagine that this is in reference to ballistic tips which sometimes explode on impact.
It is important to know what type of bullet we are talking about. If there are any instances where this is true I would imagine that you would need to specify the speed of the projectile at the barrel as well as what type of bullet is being shot.
I can only imagine that this is in reference to ballistic tips which sometimes explode on impact.
Posted on 5/17/12 at 12:35 pm to KingRanch
quote:
Good explanation BP
isn't that what I said without all the big wordy things?
Posted on 5/17/12 at 12:36 pm to bbvdd
I said it the first post with a simple equation
Posted on 5/17/12 at 12:38 pm to omegaman66
Specifically talking about the penetration offects of a 7.62 153grain bullet at 15ft vs ~100ft. The speed decreases about 10% over this range.
Posted on 5/17/12 at 12:39 pm to C
How is that even a rumor? It's so stupid it couldn't last past one repeat I would think.
Posted on 5/17/12 at 12:43 pm to C
Maybe they were thinking arrow?
Posted on 5/17/12 at 12:45 pm to C
The only way it could work is if the angular momentum of the bullet increases after it leaves the barrel. I could see this being the case some distance away from the barrel tip, but not at 15m (I wouldn't guess).
Posted on 5/17/12 at 1:05 pm to AlxTgr
Maybe if you shot from a bridge straight down to the water, the bullet could be moving with more velocity as it travels.
Until it reaches 399 yards
Until it reaches 399 yards
Posted on 5/17/12 at 1:06 pm to Bama and Beer
quote:
Very false
as opposed to just false?
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