On May 26, 7:40Â pm, "Mike Painter"
sbcglobal.net> wrote:> Michael Price wrote:
>
> Â >>> He is wrong. A musician can play great music and not know much
>
>
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>
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>>>> about it.
>>>> A shooter can be a great shot and not know the physics involved.
>
>>>> He is NOT a ballistics expert as the people on the site I posted
>>>> are. Mathematics does not use theory, it uses proof and somebody
>>>> who actually was what you claim him to be would know and be able to
>>>> use the right words. It's worse than saying a weapon has a clip
>>>> when it has a magazine or not knowing why teh colt revolvers click
>>>> four times.
>>>> It is easy to demonstrate that those diagrams are right.
>>>> Bore sight on a target at your 100 yards and fire at it. Use a
>>>> laser. Mark the spot.
>>>> Your flat trajectory for 100 yard bullit with a 3000 fps muzzle
>>>> velocity will be about 3 inches below the mark.
>
>> Â I make it 1/2 * 32 f/s^2 * (300f / 3000f/s)^2 = 16f/s^2 * (.01s^2)
>> =. 16f *12 in/f= 1.92 inches.
>
> Yep. I used a large value of one when I rounded it up. I was supposed to
> write about 2"
>
>
>
>>> No, I talked with the co-owner, he said, "Who the hell have you been
>>> talking to? First of all that is not how the formula works, and the
>>> answer is 1.2". Drop a 5 lb ball from a building, and a 2 lb ball.
>>> They hit the ground at the same time. Everybody knows that. Well,
>>> those are "dropped" not fired.
>
>> Â This is irrevelent, things fall if they are not supported and things
>> fired
>> are not supported.
>
> I posted a story about this from my high school days. A ball is released by
> a magnet as a projectile leaves the barrel of a "gun" on the other side of
> the room.
> The gun is bore sighted on the ball. Both projectile and ball drop at the
> same rate so the ball gets hit every time. The (Jesuit priest) physics
> instructor used objects big enough and velicities slow enough so you could
> see it happen.
>
> Not however that the "formula" mentioned may have included drag and 1.2 is
> closer to 1.92 than the "zero drop for 100 yards claimed"
>
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>>> They are not different bullet calibers and shapes, and different
>>> powder charges.
>
>> Â So what, they're not on a different planet and therefore they fall
>> at the same rate (less air resistance which is insignificant for falls
>> of
>> a few seconds).
>
>>> I don't know why you would have a conversation with someone like
>>> that, but he is wrong, and doesn't know what the hell he is talkng
>>> about. Don't shoot with him, as he doesn't know "squat" about
>>> guns, and obviously doesn't shoot.
>
>> Â Why because he disagrees with someone who you think knows physics
>> but doesn't?
>
>>> If you shoot with him, keep an eye on him, because that doesn't even
>>> make any sense. You would have to make a .170 to come up with that
>>> velocity, or a varmit .22 with your own powder charge to come up with
>>> that a 3000 fps speed. What the hell are you doing now to ask those
>>> kind of questions?"
>
>> Â What the hell does that have to do with it?
>
>>> I explained, and he said, "Well, the guy doesn't
>>> know squat about guns, stay away from him until some one gives him
>>> some instruction. He doesn't know anything about guns, he'll just get
>>> you hurt"
>
>> Â And why should we believe him? Â Why should we even believe he
>> exists?
>
>>> Sorry Mike, but this guy is a little blunter, and 3000 fps
>>> is awfully high. Better luck next time, I can't argue with them.
>>> They are experts, and we are not. Ken Hogan
>
>> Â You are not. Â We however are expert enough to know high school
>> physics which you evidently flunked.
>
> I picked 3000 fps because It worked nicely with the 300 feet in 100 yards
> and I could do the math in my head.
> Had I use the .45 at 850 fps or so and a distance of 100 feet teh drop would
> have been about 2.66 inches.
> Backlit by jeep headlights at night you can actually watch the .45 Â and see
> the arch  it travels over relatrively short distances. I've fired hundreds
> of rounds doing this.- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -
Every day I strap on a Glock .45 loaded with Gold Dot Personal
Pertection 230 grain bulllets, bullet type GDHP.
Bullet Cofficcient- .143 Energy (Energy in foot
pounds)
Volocity (fps) Muzzle 404
Muzzle 890 50 yards 365
50 yards 845 100 yards 331
100 Yards 800
Sighted in for 25 yards
Drop - 0.00"
50 yards -2.00"
100 yards -15.3"
Now what that means is that at 50 yards, I would have to be standing
still to be hit or hit someone (Unless they are good). At 25, depends
on practice and if your basial gangila gets froze up, (some people get
rattled), a 100 yards, good luck with a forty-five. But with a 1.2"
drop on the 460 and a red dot scope sighted in at 0.0" at 100 yards to
boot. A 100 yards even the target is moving, it a good chance. So,
again, let's leave it at this and end it. Ken Hogan
