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Volume Charges vs. Weighed Charges
In one of my recent posts I talked about using weighed charges and getting better groups. Then I got to thinking about the possibility of someone new to muzzle loading reading that and(beingunaware of previous threads on the subject)weighing out 150 grains of Triple 7 and shooting it. That would be what is known asa bad idea.
Weighed charges must be "volume equivalent". Shown below iswhat I get with my volume powder measure set on 100 grains andI fill the measure to overflowing, tap the sides with a pencila half dozen times to settle the powder, and then fill it level to the top again. Weights shown are the average of weighing each type of powder three times using the fill/tap/fill method. By the way - the "tap down" settles the powder about 1/4" below the top of the measure. 100 grains volume Goex FFG = 110 grains weight. 100 grains volume Pyrodex RS = 77.5 grains weight. 100 grains volume Pyrodex Select RS = 75.5 grains weight. 100 grains Triple 7 FFG = 77.8 grains weight. 100 grains Triple 7 FFFG = 87 grains weight. DON'T NOBODY BLOW THEMSELVES UP USING 150 GRAIN WEIGHT CHARGES!! |
RE: Volume Charges vs. Weighed Charges
An important thing to remember is re-weigh your charges each time you open a new pound of powder. What I do is say the rifle likes 80 grains of Goex 2f. I weigh five separate charges measured by volume measure set to 80 grains,to get an average weight for the charge. Then I make the rest of the weights with that ratio for that pound of powder.
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RE: Volume Charges vs. Weighed Charges
ORIGINAL: Semisane In one of my recent posts I talked about using weighed charges and getting better groups. Then I got to thinking about the possibility of someone new to muzzle loading reading that and(beingunaware of previous threads on the subject)weighing out 150 grains of Triple 7 and shooting it. That would be what is known asa bad idea. Weighed charges must be "volume equivalent". Shown below iswhat I get with my volume powder measure set on 100 grains andI fill the measure to overflowing, tap the sides with a pencila half dozen times to settle the powder, and then fill it level to the top again. Weights shown are the average of weighing each type of powder three times using the fill/tap/fill method. By the way - the "tap down" settles the powder about 1/4" below the top of the measure. 100 grains volume Goex FFG = 110 grains weight. 100 grains volume Pyrodex RS = 77.5 grains weight. 100 grains volume Pyrodex Select RS = 75.5 grains weight. 100 grains Triple 7 FFG = 77.8 grains weight. 100 grains Triple 7 FFFG = 87 grains weight. DON'T NOBODY BLOW THEMSELVES UP USING 150 GRAIN WEIGHT CHARGES!! Chap Gleason |
RE: Volume Charges vs. Weighed Charges
The problem with that Chap as taking Semisane's numbers and weights to heart is (and I mean no reflection on the information posted by Semisane) not all volume measure scales are made alike, and not all scales weight the same.
For instance, when I did 100 grains of Goex 2f with my volume scale and then weighed it on my digital scale, I got 103 grains weight. The Triple Se7en gave me 77.1 grains weight. Granted all of that will be closer then further apart, but make sure you check your own volume measure, and do this each time you change to a new pound of powder. I have found a difference frompound to pound in them as well. Not much mind you, but a difference. If we are doing this for consistancy, then lets be consistant. |
RE: Volume Charges vs. Weighed Charges
Semisane
100 grains Triple 7 FFG = 77.8 grains weight. And as cayugad says it can change a bit from lot to lot - or depending on the moisture your present bottle has absorbed after it was opened... I have never gotten into weighing charges, cause I am not shooting paper for money, and the fact that 5 grains usually makes less than 1% difference. |
RE: Volume Charges vs. Weighed Charges
ORIGINAL: cayugad The problem with that Chap as taking Semisane's numbers and weights to heart is (and I mean no reflection on the information posted by Semisane) not all volume measure scales are made alike, and not all scales weight the same. For instance, when I did 100 grains of Goex 2f with my volume scale and then weighed it on my digital scale, I got 103 grains weight. The Triple Se7en gave me 77.1 grains weight. Granted all of that will be closer then further apart, but make sure you check your own volume measure, and do this each time you change to a new pound of powder. I have found a difference frompound to pound in them as well. Not much mind you, but a difference. If we are doing this for consistancy, then lets be consistant. |
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