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scaled targets dry fire distances 1/2 scaled target ?


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#1 shmella

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Posted 24 January 2017 - 08:13 AM

I suck at math and suck even more at caring to understand the reasoning on what distance the scaled targets need to be placed to simulate a certain distance. Can someone just tell me the distance in feet (or yards i dont care) to place a target that is 1/2 scale? Assume I am retarded.. dont break down area of the target in comparison to the scaled fraction etc.Ive searched and read a bunch of things on this topic and still dont know exactly the distance to stand from the target.

 

 

I found this on Steegers proshop and I believe I have been at the wrong distances. (I have always stood farther than needed)

 

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 Yards

Example: Standing 10 feet from the target simulates a full size target at 20 yards.

 

Now second question, again assume I am retarded. I might actually be.

 

I bought dryfire targets a while ago and dont remember what scale I purchased. could someone enlighten me What is the actual size of a say 1/2 scaled target in inches? 1/3 scale? 1/6 scale?

 

I ordered some more targets so I will eventually get them and can figure it out based on what sizes I ordered and what ones I already have, but I want to dryfire tonight at the correct simulated distances with what I got.

 

 



#2 Sprewell

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Posted 24 January 2017 - 08:16 AM

Measure the width of your reduced size targets, divide that by the width of a full size target.  


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#3 ron169

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Posted 24 January 2017 - 08:21 AM

If it's a little bigger size of a notebook, is 1/2. Little bigger than your hand, 1/3, fits in your palm, 1/6

#4 Sprewell

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Posted 24 January 2017 - 08:25 AM

How do you know how big his hands are?  It is evident he doesn't know how big a notebook is.


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#5 redrider

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Posted 24 January 2017 - 08:40 AM

If you have a 1/2 scale target, it is half the size in linear measurement.

 

So if you tack it up on the wall and want to simulate being 30 feet away (roughly ten yards) then you put yourself at 15 feet away from the target. Have a half scale target, just halve the distance in either yards or feet you're trying to replicate.

 

I like to use half scale in the garage where I have more room, as where I'd dry fire in the house I don't have the room to simulate more than a 7-10 yards shot with the 1/2 targets.



#6 Doc

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Posted 24 January 2017 - 08:48 AM

Standard USPSA 'metric' target = 18" across

1/2 size = 9" across,  15' = simulated 10 yards (30 feet)

1/3 size = 6" across,  10' = 10 yards

1/6 size = 3" across,  5' = 10 yards


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#7 shmella

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Posted 24 January 2017 - 08:55 AM


Standard USPSA 'metric' target = 18" across

1/2 size = 9" across,  15' = simulated 10 yards (30 feet)

1/3 size = 6" across,  10' = 10 yards

1/6 size = 3" across,  5' = 10 yards

Thats what I'm looking for, Thanks.

 

So looks like I only have Half and 1/3 scaled so far. And I have been simulating distances all wrong.

I set up a classifier last night and was using 1/3 scale and somehow placed myself 15feet away and thought I was simulating 7 yards. Ill try it again tonight at half that distance. probably be a little easier. I didn't put too much thought into that one because the way I set it up it doesnt make sense to me any way I put it. 

 

1/3 scale= 1 foot =1 yard. That is a simple concept I dont know how I fucked that up, but I did.



#8 Peally

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Posted 24 January 2017 - 09:17 AM

1/3 are easy, just use your feet to rough out how many yards you want simulated.



#9 GuanoLoco

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Posted 24 January 2017 - 09:18 AM

Standard USPSA 'metric' target = 18" across

1/2 size = 9" across,  15' = simulated 10 yards (30 feet)

1/3 size = 6" across,  10' = 10 yards

1/6 size = 3" across,  5' = 10 yards

 

 

Thats what I'm looking for, Thanks.

 

So looks like I only have Half and 1/3 scaled so far. And I have been simulating distances all wrong.

I set up a classifier last night and was using 1/3 scale and somehow placed myself 15feet away and thought I was simulating 7 yards. Ill try it again tonight at half that distance. probably be a little easier. I didn't put too much thought into that one because the way I set it up it doesnt make sense to me any way I put it. 

 

1/3 scale= 1 foot =1 yard. That is a simple concept I dont know how I fucked that up, but I did.

 

Doc is dangerously close to being nominated as Doodie's resident SME at the maths.  

 

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#10 Doc

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Posted 24 January 2017 - 02:06 PM

...not much different than estimating tit size at various distances.
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#11 Peally

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Posted 24 January 2017 - 02:24 PM

The principle is the same.



#12 RDS

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Posted 24 January 2017 - 04:12 PM

for super advanced (as has already been mentioned here) the arc length of a circle is proportional to the radius.  That means the width of your targets will scale down directly as  distance increases.  

 

Or in english--the width the target "appears" to you is proportional to its width and the distance away.  So a target 18" wide at 10 yards appears the same size as a 9" target at 5 yards.

 

direct proporation  width/distance=some constant.

 

So if your targets are 1/2 size you may put them TWICE as close as a "real" target

If your targets are 1/6 size you may put them SIX times as close as a "real" target

 

For you airheads that argue that an arc length is not a straight line distance, you are correct, however I would like to introduce you to the small angle approximation--

 

A full size target is 18 inches across.  Even at 7 yards  the difference bewteen the arc-length and a flat line is .003 inches.

 

inverse sine (9/(36*7)) * 36*7 * 2 = 18.003828728631712890875040899042  because for small angles, sin x = x .. THose last digits are  probably off cause of Windows and floating point math.

 

I cant shoot for shit, but I can math the fuck outta this.


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#13 Sprewell

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Posted 24 January 2017 - 04:16 PM

I just got a tingly feeling in my leg.



#14 Dbellyflop

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Posted 24 January 2017 - 09:40 PM

Yes dear, it really is....

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#15 Stelio Kontos

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Posted 24 January 2017 - 09:53 PM

You fools aren't factoring in your arm length.
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#16 Doc

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Posted 25 January 2017 - 06:07 AM

Only T Rex worries about arm length.
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#17 ralloway

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Posted 25 January 2017 - 07:24 AM



I set up a classifier last night and was using 1/3 scale and somehow placed myself 15feet away and thought I was simulating 7 yards.


You may be doing this somewhat right (in one manner of speaking):

Make practice harder than the match. That way, what you encounter in the match is easy by comparison.

Although, approx double the distance may be a bit overzealous. :P

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#18 barry owens

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Posted 25 January 2017 - 11:22 AM

Make practice harder than the math.


That's what I read after all that math.

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#19 Trigger Warning

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Posted 26 January 2017 - 09:49 AM

If you don't have the 1/3 targets (or don't like the inaccurately scaled perfs), you can get the same result by buying Ben's dry-fire sights, which are 3 times larger than normal sights, making the target seem 3 times as far away as it is.


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#20 Trigger Warning

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Posted 26 January 2017 - 09:57 AM

Making practice as similar to a match or even harder is definitely key.  I was reading Ben's new book "High Secrets of a Match Grandmaster" and he points out that doing a drill with a par time of say 6 seconds should then be followed up by sitting around for 30-45 minutes and then doing another drill for 5 to 6 seconds followed by sitting around for another 30-45 minutes or so.  

 

Do this until you have completed 6 drills and this simulates, as closely as possible, a real match.  Just as it is critical to focus during the drill, it is also critical to let nothing interesting distract you during the sitting around part.  

 

If you want to clean mags during the sitting around part, retreat to the rear of the room and if possible do the activity behind a piece of furniture, which properly simulates paste-dodging during a match.


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