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Setting up Dry Fire targets


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#1 RMJack

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Posted 30 May 2016 - 10:19 AM

My dad used to say there are no dumb questions, just dumb people...  Here's one where I resemble that remark...

 

I have some 1/2 size metric targets. Is the distance reduced by 1/2 or a 1/4? 

 

How far do I need to be away from the wall for 10 yards, 25 yards, 50 yards?

 

And I have a box of those tiny targets from the Proshop - 1/6 I think? How far away for those, 7 inches?

 

btw - Happy Memorial Day!



#2 RockOutGLOCKOut

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Posted 30 May 2016 - 03:00 PM

1/6 literally equals 1/6 the distance.

1/3 are my favorite... no math... 3 feet = simulated 3 yards. 10 feet = simulated 10 yards. This is the option to buy if you need a digital watch.
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I like my Glocks like I like my women; 19 and in my pants.


#3 peterthefish

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Posted 30 May 2016 - 03:53 PM

But what height do you set them at? Do you still put the top of the shoulders at 5', or do you scale down based on the center of the target? Or center of the A Zone?
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#4 RockOutGLOCKOut

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Posted 30 May 2016 - 05:01 PM

I always put them about shoulder level, but this is the first time I have ever thought about the height.

I like my Glocks like I like my women; 19 and in my pants.


#5 RMJack

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Posted 30 May 2016 - 05:20 PM

1/6 literally equals 1/6 the distance.

1/3 are my favorite... no math... 3 feet = simulated 3 yards. 10 feet = simulated 10 yards. This is the option to buy if you need a digital watch.

 

Hi ROGO, 

 

Are you sure that's true? I think if you're using 1/2 sized targets, then you quarter the distance. 1/2 target width and height  is 1/4 the surface area, 

 

e.g. 30" x 18" full size metric target = 540"**2 - (ignore the fact the head doesn't go across the whole 18")

       15" x 9" 1/2 size targets = 135"**2 - 1/4 the area of the full size target

 

ergo - your ratio for these targets becomes 4 to 1 - 1 units of distance from a 1/2 sized target = 4 units of distance for a full sized target

 

So

 

15" x 9" target 

 

 5 yards = 1.25 yards

10 yards = 2.5 yards

15 yards = 3.75 yards

20 yards = 5 yards

25 yards = 6.25 yards

35 yards = 8.75 yards

40 yards = 10 yards

50 yards = 12.5 yards

 

If I'm not right, please let me know, otherwise I'll be in the man cave putting tape on the carpet...



#6 teenlaqueefah

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Posted 30 May 2016 - 05:24 PM

But what height do you set them at? Do you still put the top of the shoulders at 5', or do you scale down based on the center of the target? Or center of the A Zone?


It's complicated.

#7 teenlaqueefah

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Posted 30 May 2016 - 05:25 PM

If I'm not right, please let me know


You're not right.
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#8 peterthefish

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Posted 30 May 2016 - 05:26 PM

Hi ROGO,

Are you sure that's true? I think if you're using 1/2 sized targets, then you quarter the distance. 1/2 target width and height is 1/4 the surface area,

e.g. 30" x 18" full size metric target = 540"**2 - (ignore the fact the head doesn't go across the whole 18")
15" x 9" 1/2 size targets = 135"**2 - 1/4 the area of the full size target

ergo - your ratio for these targets becomes 4 to 1 - 1 units of distance from a 1/2 sized target = 4 units of distance for a full sized target

So

15" x 9" target

5 yards = 1.25 yards
10 yards = 2.5 yards
15 yards = 3.75 yards
20 yards = 5 yards
25 yards = 6.25 yards
35 yards = 8.75 yards
40 yards = 10 yards
50 yards = 12.5 yards

If I'm not right, please let me know, otherwise I'll be in the man cave putting tape on the carpet...


This is unlikely to surprise you, because if memory serves you're an A6 IDPGay shooter, but you're dumb as a bag of rocks.

Carry on.

#9 peterthefish

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Posted 30 May 2016 - 05:34 PM

It's complicated.


That's pretty much the conclusion I came too.

#10 RMJack

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Posted 30 May 2016 - 05:53 PM

This is unlikely to surprise you, because if memory serves you're an A6 IDPGay shooter, but you're dumb as a bag of rocks.

Carry on.

How you wound me Peter!

 

I'm an (old) noob in A1. Never did an IDPA match in my life. I thought we had something special with the dummy rounds... Apparently I was just a cheap ticket to a paycheck...

 

My mellow has been harshed.



#11 RMJack

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Posted 30 May 2016 - 05:53 PM

You're not right.

Ok, so what is right? 



#12 teenlaqueefah

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Posted 30 May 2016 - 05:54 PM

That's pretty much the conclusion I came too.


I derived a formula based on a bunch of things, including the simulated target distance, the simulated target height from the ground, the scale of the dry fire target, and the height of the shooter, and I came to the conclusion that it wasn't worth the effort and that I should be dry firing instead of working on stupid shit like that.
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#13 teenlaqueefah

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Posted 30 May 2016 - 05:55 PM

Ok, so what is right?


What post #2 said.
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#14 RMJack

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Posted 30 May 2016 - 06:00 PM

A 1/X scale target placed D feet away will simulate a distance of D*X feet.


I like it! A general formula for any scale target. Works for my 1/4 targets.

Thanks again.

#15 peterthefish

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Posted 30 May 2016 - 06:28 PM

I like it! A general formula for any scale target. Works for my 1/4 targets.

Thanks again.


1/4 linear dimension, not area.
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#16 JoeyBagODonuts

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Posted 30 May 2016 - 06:41 PM

Yeah, RM - you were thinking sound/radio waves where the loss is equal to the square of the distance or something like that.


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Wait, I smell more than donuts...


#17 Maxamundo

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Posted 31 May 2016 - 08:20 AM

Make sure you mount the TOP perforation of the head of the targets EXACTLY 69 inches high, otherwise you'll develop catastrophic habits instantaneously and never gain ANY results from your dry fire WHATSOEVER.

Also use a protractor to make sure that they are all exactly vertical.

#18 Moustache6

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Posted 31 May 2016 - 08:43 AM

1/3 Scale: 1 Foot = 1 Yard
Example: Standing 10 feet from the target simulates a full size target at 10 yards. 

 

1/6 Scale: 1 Foot = 2 Yard
Example: Standing 10 feet from the target simulates a full size target at 20 yards. 

 






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