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HOWDY DAVIS

 Chief Factor - Staff Writer

   Smoke Signals

                   Sep./Oct. '10

 

HOWDYs TIPS FOR BLACK POWDER SHOTGUN SHOOTING

PART 2

12 gauge load for target shooting knock down steel targets is 90 grains of 2Fg behind 1 1/4 oz. of shot. You can use 80 grains of 2Fg powder, the pattern is sometimes denser.

SHOT PELLETS PER OUNCE

SHOT SIZE SHOT DIAMETER (INS) NO# OF PELLETS PER OUNCE

12 .05 2385

9 .08 585

8 .09 410

7-1/2 .O95 350

6 .11 225

5 .12 170

4 .13 .135

2 .15 90

BB 18 50

NOTE: Use a CVA Shotgun Volumetric Measurer. With this you can use equal Volume for Volume proportions of powder to shot - NEVER BY WEIGHT.

STEEL SHOT PELLET DIAMETER

NO# 7 .100 B .170"

6 .110 BB .180"

5 .120 BBB .190"

4 .130 T .200"

3 .140 TT .210"

2 .150 F .219"

1 .160

PELLET HARDNESS VARIATION

TYPE SHOT BURNELL HARDNESS

Pure lead ==== 5.0

Remington Bag Shot no. 71/2 - 11.4

Winchester === 71/2 - 13.9

Remington ===== NO#2 - 12.0

Copper Plated Shot === 9.0

Winchester AA Shell NO# 8 === 17.8

Winchester AA Shell NO# 7-1/2 === 20.0

Peters Rx P Shell NO# 7-1/2==== l8.0

Lead Shot Plus 10% tin alloy 11.5

CHOKE PATTERN DENSITY

Extra Full = 80% or tight

Full Choke = 70 to 79 %

Improved Modified = 65 to 69 %

Modified = 55 to 64 %

Improved Cylinder 1 = 50 to 54 %

Improved Cylinder II = 45 to 49 %

Cylinder = under 45 %

RECOMMENDED MAX. POWDER CHARGES

.32 40 GRS. 3F

.36 50 GRS 3F

.40 60 GRS 3F

.45 70 GRS 3F

.50 80 GRS 2F

.54 90 GRS 2F

.58 90 GRS 2F

CAUTION: Pressure generated from ignition: 100 grains of 3 Fg powder behind a patched round ball will generate much more pressure than the same volume of 2 Fg powder.

A barrel 1" across the flats; 3 Fg. charge may burst that barrel, You must lower the charge.

FORMULA: Choosing a charge - 7:3 --- for every 7 grains of ball weight use 3 grains of powder.

Now, go burn some powder!

Howdy Davis

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updated  09/10/2010   

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