Sunday, January 26, 2014

Joe Knows

'Bully Pulpit' to On

Some people get it.


Be as well armed as your assailant

Others never will!

Here's the letter that prompted Joe to write the above comment:


Legislation to promote violence  Jan 10 2014 ABJ
A “stand your ground” bill has passed the Ohio House.  It should be called the “shoot, don’t retreat” bill, to be honest with the voting public.



Why the majority of our legislators in the House are promoting more handgun violence is a real mystery. We all know that handguns are instruments of fear, so if the legislators who voted for the bill are fearful and carry concealed handguns, one would think they would be against more handgun violence, not in favor of it.

All bills should represent what the majority of the public wants for itself and its children. I do not believe we want to teach our children to shoot instead of retreating when confronted by violence.

Instead, we should teach them to stand their ground, not with a loaded handgun, but with a smile on their faces. Violence in response to violence begets more violence, not less.


Jim

Stow
My PS:
I am reminded of Jeff Cooper's comments on begeting violence. Cooper thought anyone who offers violence to a person should have so much begeted violence returned to him that he'll take his violence and offer it to someone else. 

Again, some people get it. Others don't.

'Bully Pulpit' to Off















Monday, January 20, 2014

Stupid People with Guns

It’s easy to find stuff for this blog.  For example:

Vice President Biden Tactical School Graduate
I got sucked into this conversation at the last gun show.
Him: “We’ve had a lot of break-ins in my neighborhood recently.  My neighbor, who is anti-gun, asked me what he should get for protection at home.  His wife is worried.”
Me:  “What did you recommend?”
Him: “I told my neighbor to get a single shot 12-gauge shotgun.  I told him that would take care of any problem.  I even had a few extra shells to give him so he doesn’t have to buy a box.” 
Me:  “Single shot?”
Him: “Yep, he got one too! His wife feels a lot better.”
Me: “What if there’s two of them?”
Him:  Silence.  He walked away.

Another topic from the law enforcement front which I call –
Brimfield Police to take remedial gun cleaning classes

“Two Brimfield Township police officers have been disciplined after one of their guns ACCIDENTALLY (my emphasis) fired while they cleaned their weapons at Field High School…  No students were harmed…”  ABJ newspaper 18 Jan 2014

 Why is it people always try to clean loaded guns?

It appears the officers used an isolated cinder block room while classes were in session.  Police Chief Oliver says everything is cool because “the department at the time didn’t have a policy covering the cleaning of weapons at school by resource officers…”  That apparently makes it okay.   Officer Dinkelman (no, I’m not making this up) whose .45-caliber semiautomatic pistol discharged, was suspended for three days. 
The chief indicated the two officers were at the range the previous night and had dirty weapons and the gun malfunctioned. 

(I don't know..I once shot 700 rounds in one day without cleaning and not a single malfunction.  I think the malfunction was between the ears.) 

There are just too many questions and comments.  I’m sure you can think of most of them.  Their job was to provide armed security for the school, and these two had left their post and deactivated their weapons.  Some security!  I've got to ask,  “What were they thinking?”

Stupid Human Tricks
Talk about thinking?  I also found an article about another Detroit shooting.  Shootings in Detroit, unfortunately, aren’t even newsworthy unless it is truly a great tragedy.  On the last page of the ABJ front section the news media reports a truly needless shooting.  Two 4-year olds find a loaded small caliber rifle at grandpa’s last Friday under his bed.  The only adult home at the time is a family friend which means it could be anyone.  The 4-year old girl managed to point the rifle at her 4-year old cousin.
 
I could try to joke about interfamily rivalry and enflamed passions erupting, but there really isn’t anything funny about it.  The 4-year old pulled the trigger and her cousin was pronounced dead at the hospital. 

Nothing but tragedy all the way around on this one.  Who would be foolish enough to leave a loaded firearm where children could find it? 

What did grandpa think?  That if there was a home invasion in the middle of the night he would wake up, assess the situation, jump up, roll under his bed ninja-like, retrieve the loaded rifle he keeps there and move to a defensive position in his home?  I guess he did.  Maybe he was keeping it there to shoot marauding squirrels and disrespecting cats. 

I once worked with a fellow who lived in the suburbs and felt stray cats were urinating on his basement windows.  He used to say you can always fire one round from a .22 rifle from inside the house without alarming the neighbors and slowly work away the free-range cat population.  Was grandpa up to the same thing?  Considering the state Detroit is in, you might be able to fire a .308 from inside your house without alarming the neighbors.


I tell my students the only safe place for a loaded gun is on you and under your immediate control.  And frankly, a small caliber rifle (a .22 LR, I suspect) isn’t the best choice for a self-defense weapon.  It may have been the only option grandpa had, but he should have unloaded it when he got up and loaded it at the end of the day.  Haven’t enough children been hurt by thoughtless/stupid adults? 

Sunday, January 12, 2014

Holding the Rifle Level

The weather was especially nice for early January, 50°  but windy, and I needed to get out to the range.  I wanted to shoot my scoped AR.  I’ve been reloading 68 grain JHP in .223 Rem for it and I wanted to make a joyous noise.  I also wanted to try out another project.

Since the sniper match last year (http://tactical-talk.blogspot.com/2013/10/ipsc-sniper-or-shoot-faster-faster-you.html) I’ve been wanting to see how my point of impact changes when the rifle is rotated from its normal shooting position.  You know, bore squarely under the scope and both perpendicular to the center of the earth.  When the bore and sights aren’t in this orientation bad things happen. 

Bad things?  You usually miss the target. 

Rifle bore not in line with sights
Sometimes you have to incline the rifle to shoot through an opening.  This creates problems.  Note bubble level on scope.

The blog, “Things Worth Believing In” has an excellent overview of rifle twist and how your impact changes when the bore isn’t directly under the sights.  Check Tom’s blog “Twist and Shoot” for more information.  Keep reading to "When things Go Sideways."  I wish I had thought of that title.....

Here’s my take on this.

Since Galileo we have known that an unsupported object starts to drop the instant support is removed.  The instant the bullet exits the gun barrel it too starts to fall.  To get the bullet to a target farther down range than dozen feet or so we incline the barrel upward so some of the force used to push it down the barrel is also used to push it upward.  At some time during the projectile’s short life, gravity saps all the upward motion and it starts to fall.  Almost any explanation of external ballistics will show you images like:




and 
Both cartoons show how the rifle barrel is inclined so the fired shot crosses the line of sight.  The rifle is set up this way to give the bullet some upward force to resist the pull of gravity.   Eventually gravity pulls the bullet downward and back across the line of sight.  


So what happens when I twist the rifle so the bore and sights aren’t one under the other and perpendicular to the center of the earth?  Doesn’t the impact just shift by a small amount?

Several things happen.  One, the barrel isn’t aimed at the same point as your sights.  How much difference will depend on the amount of displacement from normal position, the distance between your sights and the bore and, I suspect, your zero.  

What complicates this is we forget that the bullet no longer has that arc upward to help it resist gravity so it starts to fall as soon as it leaves the muzzle.  And it falls at 32 ft per second squared or 32 feet in just the first second.

The difference between your impact and your aimed point of impact will change depending on the distance as well as the amount of offset.  Have your rifle twisted sideways a little and you’re off a little at 25 yards.  Shoot at an elk at 300 yards and its likely all you do is frighten the animal and give it some exercise.

I had previously zeroed my scoped rifle at 100 yards on a nice dry 80° day.  Today was 48° (and now rainy) so I expected some change in performance off sand bags and I got it.

Work station with rifle and rest
I'm set up at my bench.  The equipment is simple: a sand bag, ammo can to hold the sand bag and my scoped rifle.

my black bullseyes for this experiment
I like using these targets for rifle 'cause there's five of them and each has a letter or number so I can take better notes on my progress.  This is 100 yards from the bench.



I set up my shooting station and put my target out at 100 yards. 


My scope uses a chevron as the aiming point and placing the black chevron on the center of the back target was difficult.  I had a certain amount of uncertainty holding a black chevron on the center of a black target.  

check of zero with properly alined bore and sight
Low and at the 6-7 divider.  Not very good off a sand bag.

When I inspected the target it looked like my zero had drifted.  Then it occurred to me, I could illuminate my chevron so it stood out on the black target.

No, I'm not lobbing my rounds over the backstop and into the trees.   It's damn hard to hold the rifle and camera to image the illuminated chevron.  So I laid my rifle on the sand bag and used both hands for the camera.  It would have been so easy with an optical bench!!! 

So I turned on my light and re-shot my zero.  I was much happier with those results.  Considering the wind, the temperature and shooting with gloves on, I’m happy with that group.

With illuminated chevron.  It's 30-40 degrees colder than when I zeroed my rifle last summer.

I then turned the rifle so the scope was between 10 and 11 o’clock and the magazine between 3 and 4 o’clock.  (Yes I know it’s redundant to describe both positions, but I feel the need to be well defined in this experiment).  I re-positioned my rifle so the chevron was centered on the center and shot my group.


I’m sure the fellow shooting at the other end of the range must have thought I was nuts and I’m sure that was confirmed when I went down range and photographed my targets.

How did my group come out?  Well, if I was aiming at a man-size target to hit the heart, I would have caught his lower right lung.  I was 5 inches low at 7 o’clock.  That means I need to shift my aim up to 1 o’clock about 5 inches from the center to drop the rounds into the center black.

off set bore and sight results in dropped shoots
I've offset the relation between rifle bore and rifle sight by 45 degrees.  Big change in impact!

I’ve been thinking of constructing an exercise for the monthly rifle group meeting this spring to demonstrate this problem and give them a chance to practice and adjust for this shift of impact.  But I’ve got to tell you, it’s difficult to shoot a rifle twisted 45 degrees off a sand bag rest from the seated position.  The butt stock barely contacts your shoulder.  If the caliber was any bigger than .223 you might have real trouble controlling recoil.


My thought experiment from this test suggests canted rifle shots will be low and displaced towards the target side opposite of the rifle’s magazine.  My thought experiment does not describe what happens at close range (between the muzzle and your zero) or how the displacement increases past your zero.


It does point out why some hunting rifles have a bubble level on the scope and bi-pods have independently adjustable legs.