Dan Theodore - Post-Post-Script - Clean Rifle and 6th Shot Effects Stats II


 

Gentlemen,

 

Now that more time has passed, more questions have surfaced as a result of the testing results.

 

The first question is why are the differences between the average MV’s between blow-tubing and wiping so small for the three lubes tested?  In 90 F temperatures the differences are about typically twice what was recorded in the cool, 40-45 F, and humid (60 to 62 %) conditions.  I believe there is some very useful learning there that can be applied to lube development.  What that learning is will require a lot of thinking and some more testing to tease out the cause and effect as well as application.

 

The second question is: why does the average MV difference between blow-tubing and wiping for a particular lube have such a large difference between the lubes tested?  For instance, the average MV’s for the commercial lube between blow-tubing and wiping was 14 fps.  The average MV’s difference for WL Lube between blow-tubing and wiping was 11 fps.  Finally, the difference for WL Lube Extreme between blow-tubing and wiping was only 4 fps.  This really is an interesting phenomenon.   After numerous tests of this sort over the past few years, I’ve never seen such a small difference for any lube tested.

 

What I think we have here is a quantitative result that shows WL Extreme is less moisture sensitive and produces more consistent MV’s that will translate into better accuracy and reduced flyer’s during match conditions, especially in harsh conditions if my years of testing results hold true.  Also, look at the SD (standard deviation) deltas between blow-tubing and wiping for the commercial lube and WL Extreme.  Those deltas are very interesting.  The SD delta (wiping SD minus blow-tubing SD)  between blow-tubing and wiping for the commercial lube is 2.4.  The delta for WL Extreme is only 0.4.  What does that say?  My take is that moisture content and fouling level in the barrel have little effect on MV for WL Extreme.

 

If all of the WL Extreme data, blow tubing and wiping are thrown together and the data quantified from a statistical standpoint we have the following:

 

Average MV: 1,251 fps

High MV: 1,256 fps

Low MV: 1.246 fps

Extreme Spread: 10 fps

Standard Deviation: 3.6

 

If the same is done for the Commercial lube we get the following if we don’t remove the “Excluded Shots.”

 

Commercial lube:

Average MV: 1,259 fps

High MV: 1,278 fps

Low MV: 1,246 fps

Extreme Spread: 32 fps

Standard Deviation: 9.5

 

It seems that the research and development is trudging along in the right direction.  All that is need now it some hot, dry weather to move forward with the testing.

 

The data chart is listed below to show what is referred to above.

 

Shot #

Commercial Blow Tube Clean Barrel

Commercial Wipe Fouled Barrel

WL Blow Tube Clean Barrel

WL Wipe Fouled Barrel

WL Extreme Blow Tube Clean Barrel

WL Extreme Wipe Fouled Barrel

1

1,278 Shot Excluded

1,265

1,286 Shot Excluded

1,265

1,252

1,255

2

1,265 Shot Excluded

1,266

1,250

1,263

1,247

1,249

3

1,249

1,255

1,248

1,265

1,246

1,254

4

1,252

1,260

1,249

1,255

1,253

1,247

5

1,254

1,257

1,248

1,257

1,247

1,255

6

1,246

1,265

1,250

1,259

1,246

1,254

7

1,247

1,274

1,250

1,266

1,248

1,254

8

1,248

1,260

1,251

1,256

1,247

1,255

9

1,247

1,271

1,247

1,259

1,247

1,256

10

1,255

1,263

1,252

1,259

1,250

1,254

MV Avg

1,250

1,264

1,251

1,262

1,251

1,255

MV High

1,255

1,274

1,252

1,266

1,253

1,256

MV Low

1,246

1,255

1,247

1,255

1,246

1,247

Velocity ES

9

19

5

11

7

9

SD

3.5

5.9

1.6

4.0

2.5

2.9

 

02-07-05