Untitled Document

Multi-Scale Charge Ltd.t

 

Multi-Scale Charge Ltd.

MANUALS

 

Shuttle Charge Bar Model


Powder Baffle


Powder Chart

 

Steel Shot Chart

 

Lead Shot Chart

 

Bismuth Shot Chart


Adjusting the Powder and Shot Valves

 

Checking Powder Charts


Reading the Powder and Shot Charts


Calculating additional Powder and Shot settings


Additional Essential Tools (not included)


Assembly

 

Removing the Shot Valve inserts


General Cares

 

Glossary


Picture and Line Drawing


Additional Notes

 

Calculating additional Powder and Shot settings

Note:
The supplied powder charts are given mainly in even grains. Likewise, the supplied shot charts are given in eigth of an ounze increments.

A simple fact, based on the design of the scales on the bar and the scales on the adjusting knobs, makes it possible to calculate quantities that lie in between two quantities shown of the charts. Successful calculation requires only elementary arithmetic.

This method, given below, applies to the computation of settings
for BOTH powder and shot.

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FACT: Both the powder valve and the shot valve are controlled by two scales each, one on the front edge of the bar, the other on the adjustable knob at the end of the bar. Just like feet and inches can be converted to inches, the bar and knob scales can be easily converted to knob units. Remember, one unit of the bar scale is equivalent to 40 units on the knob scale.
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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
ALWAYS use common sense
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Regardless whether you are using charts,
your own calculations,
or those of someone else,
review ALL settings for logical consistency
B E F O R E loading and firing
a charge based on a given setting.

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How to make settings which are not shown on the chart


The powder chart shows values in full grain-increments only.

Example:
SR 7625
{43 grs.} 14 + 13
{44 grs.} 14 + 30
SR 7625
Suppose one needs a charge of 43.5 grs. instead of 43 grs. or 44 grs. of SR7625 powder. The setting for 44 grs. of SR7625 is 14 + 30. The setting for 43 grs of SR7625 is 14 + 13. Subtract 13 from 30 = 17 increments. Then divide 17 by 2, which is 8.5, and add the 8.5 to 14 + 13 which then becomes 14 + 21.5. This setting will give you a charge of 43.5 grs. of SR7625.

The same method can be applied to all other charges and settings.


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How to get a 1/2 grain setting between two full grain settings where one bar setting is, let's say, 9 + 36
and the next higher setting is 10 + 12:
Example:
Blue Dot
{40 grs.} 9 + 36
{41 grs.} 10 + 12
Blue Dot

Explanation: How many increments are there or, how many increments (or stitches on the knurled knob) must the knurled knob be moved in order to get from 9 + 36 to 10 + 12? To start, let's count: 1, 2, 3 to 0 for four increments.

Now let's look at the scale on the Bar-body: the reference line on the valve is now aligned with line 10 and the line on the knob is at 0.

Therefore, this setting is 10 + 0. To go from 10 + 0 to 10 + 12, we have to move the knob another 12 increments (or lines, or stitches).

Now, how many lines did we move on the knob altogether? From 9 + 36 to 10 + 0 it is four lines plus another 12 lines to 10 + 12, makes it 16 lines.

If it takes 16 lines to go from 40 grs. of Blue Dot powder to 41 grains of Blue Dot powder, how many lines do you have to move the knob to throw 1/2 of a grain? Divide 16 by two and the answer is 8 lines.

Add 8 to 9 + 36, and one could say, that one has a setting of 9 + 44.

But, since there is no such setting (or reading), since there are only 40 lines on the knurled knob, we have to move the knob four lines past the 0.

This reading then becomes 10 + 4.

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We expect that the above examples will work for everyone. A more general method is given below. You should always get the same results with either method.

continues at G E N E R A L M E T H O D _____________________________________________________________________________

CAUTION:

USE POWDER AND SHOT CHARTS ONLY FOR THE BARS WITH WHICH THEY CAME.

MODEL B201 POWDER AND SHOT CHARTS ARE FOR USE ONLY WITH MODEL B201.

MODEL B201 POWDER AND SHOT CHARTS ARE NOT TO BE USED WITH MODEL "C/CS" AND MODEL "D/DS" OR FOR ANY OTHER MODEL CHARGE BAR.

THE METHOD OF CALIBRATION FOR THESE MODELS IS DIFFERENT ENTIRELY FROM MODEL B201.

USE OF THE WRONG POWDER AND/OR SHOT CHART COULD RESULT IN SERIOUS DAMAGE AND/OR INJURY.

DO NOT USE THE UNIVERSAL CHARGE BAR WITHOUT A POWDER SCALE.

 

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It is strongly advised to check all charges (powder & shot) with a reliable scale.
(see " How to check powder charges ".)

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Common sense precautions are advised. Make sure you fully understand the instructions before beginning. If you do not clearly understand the instructions, do NOT use the Bar!

Avoid careless handling of flammables and explosives as this can result in serious injury or death.

Multi-Scale Charge Ltd.t
Copyright ©1980-2008 Multi-Scale Charge Ltd. Last updated: March 2016