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 More Hodgdon Triple 7 Tests


<H2 Hodgden Triple 7 Powder /H2>After the first test with the Knight Disc Rifle and Hodgdon Triple Seven (H777), I was encouraged to try more bullets and heavier charges to see if the performance could be improved.  In addition I wanted to do a comparison test with Pyrodex and Hodgdon Triple Seven Powders.

Pyrodex vs. Triple Seven

On the last trip to the range, I found that Hodgdon Triple Seven was cleaner burning than Pyrodex, and there was no sulfur odor. It also made rifle cleaning a lot easier.  The next thing I wanted to know was how the performance of H777 compared to Pyrodex.  For the test I used the 195 grain Powerbelt bullet and a 110 grain charge of each powder.  The Triple 7 was clearly the velocity winner, averaging 120 fps higher velocity. Performance will probably vary depending on the bullet used, but my initial test for the bullet I planned to use for hunting reassured me that the switch to Triple Seven was worth the extra money.

New Bullet Weight Tested
 

ODHA Triple Seven Data for
.45 Caliber Magnum Muzzleloaders

Bullet/Sabot

100 gr.

110 gr.

140 gr.

155 gr. T/C XTP

2220

2285

 

175 Lead/sabot

 

2100

2345

195 gr. Power Belt

1985

2065

 

Next, I chronographed a 175 grain lead .401 caliber semi-wadcutter pistol bullet in a TC sabot.  The 175 gave me good velocity with 110 grains of H777, so I bumped up the powder charges. Unlike the the other bullets in my initial test,  I did pick up some significant extra velocity when I increased the powder charge to 140 grains. As you can see in the chart, the extra velocity translates into more energy and flat trajectories.  The new bullet did very well compared to the two bullets previously tested. I included the trajectory tables so you can compare the 175 with the other bullets. I have not shot it enough to compare the accuracy to the Powerbelts, but more testing is planned. I just happened to have a box of 500 bullets normally used for loading 40S&W ammo.  Now to find a good plastic sabot to use with it.

Trajectory Tables

I told you about the JBM web site in the first report. I have included some of the trajectory tables this time for your review. You will be able to compare the differences in velocity, energy, bullet path, etc.

.45 Caliber 195 Powerbelt

Range

Velocity

Energy

Momentum

Drop

Windage

Lead

Time

(yards)

(ft/sec)

(ft-lbs)

(lbs-sec)

(inches)

(inches)

(inches)

(sec)

0

2063.2

1843.1

1.79

-1.5

0.0

0.0

0.000

50

1870.7

1515.2

1.62

0.5

0.7

13.4

0.076

100

1690.8

1237.8

1.46

-0.0

2.7

28.3

0.161

150

1524.8

1006.6

1.32

-3.6

6.4

44.7

0.254

200

1375.7

819.4

1.19

-10.9

11.8

63.0

0.358

250

1247.6

673.9

1.08

-22.8

19.2

83.1

0.472

40 Caliber 175 Lead/sabot

Range

Velocity

Energy

Momentum

Drop

Windage

Lead

Time

(yards)

(ft/sec)

(ft-lbs)

(lbs-sec)

(inches)

(inches)

(inches)

(sec)

0

2345.6

2137.8

1.82

-1.5

0.0

0.0

0.000

50

2046.8

1627.8

1.59

0.3

0.8

12.0

0.068

100

1771.4

1219.2

1.38

-0.0

3.4

25.9

0.147

150

1524.3

902.9

1.18

-3.1

8.3

42.0

0.239

200

1313.6

670.5

1.02

-10.0

15.7

60.7

0.345

250

1150.0

513.9

0.89

-21.9

26.0

82.2

0.467

40 Caliber 155 TC Mag Express/sabot

Range

Velocity

Energy

Momentum

Drop

Windage

Lead

Time

(yards)

(ft/sec)

(ft-lbs)

(lbs-sec)

(inches)

(inches)

(inches)

(sec)

0

2285.2

1797.3

1.57

-1.5

0.0

0.0

0.000

50

1990.6

1363.7

1.37

0.4

0.8

12.4

0.070

100

1720.5

1018.7

1.18

-0.0

3.6

26.6

0.151

150

1479.7

753.5

1.02

-3.3

8.6

43.2

0.245

200

1277.6

561.7

0.88

-10.7

16.3

62.4

0.355

250

1124.6

435.2

0.77

-23.3

26.9

84.5

0.480

  

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