- Joined
- Jul 9, 2016
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Hi all,
I started using BH209 this year, I really love the stuff. However, I could never really get truly repeatable results by measuring by volume.
I have several different powder measures that I use and they are very close to each other when checked. I do reload for my cf rifles and have a RCBS Chargemaster scale. I like weighing my charges for consistency and for me it is easier to pump out alot charge tubes.
According to Western Powders, to weigh charges use a .7 factor to convert from volume. 100 grv = 70 grw.
My process was to measure, by volume, 20 charges for 90grv, 100grv, 110grv & 120grv, then weigh them on my Chargemaster.
I tabulated the results, disregarded the highest and lowest values and then averaged the results. My data indicated weighed charges
7 grains heavier than the BH209 data. Has anyone else experienced the same results?
What is interesting is when I extrapolate the data below for 10 grains by volume vs. by weight , it does match the data from Blackhorn for a value of 7 grains by weight to 10 grain by volume. It is just a little confusing as to why all the values are off by approximately +7 grains (by weight). Is this due to the fact that there is no industry standard for volume measures? The 3 measures i have are very close to each other, and I tried to be consistent in the method I used ensure all things would be equal. I basically would fill the measure and tap it 4 times until full, then move the cap to level it off, then weigh the charge. The scale was calibrated.
I did talk to Western Powders, they basically said that all black powder is measured by volume and they appreciated my approach, but as long as what every measure I used, 120 grv was to be considered max regardless to what it would weigh.
Here are my results;
Load Data From BH209 = My data
90 grv (63 grw) = 70 grw avg
100 grv (70 grw) = 77 grw avg
110 grv (77 grw) = 84 grw avg
120 grv (84 grw) = 91 grw avg
Any comments would be greatly appreciated.
I started using BH209 this year, I really love the stuff. However, I could never really get truly repeatable results by measuring by volume.
I have several different powder measures that I use and they are very close to each other when checked. I do reload for my cf rifles and have a RCBS Chargemaster scale. I like weighing my charges for consistency and for me it is easier to pump out alot charge tubes.
According to Western Powders, to weigh charges use a .7 factor to convert from volume. 100 grv = 70 grw.
My process was to measure, by volume, 20 charges for 90grv, 100grv, 110grv & 120grv, then weigh them on my Chargemaster.
I tabulated the results, disregarded the highest and lowest values and then averaged the results. My data indicated weighed charges
7 grains heavier than the BH209 data. Has anyone else experienced the same results?
What is interesting is when I extrapolate the data below for 10 grains by volume vs. by weight , it does match the data from Blackhorn for a value of 7 grains by weight to 10 grain by volume. It is just a little confusing as to why all the values are off by approximately +7 grains (by weight). Is this due to the fact that there is no industry standard for volume measures? The 3 measures i have are very close to each other, and I tried to be consistent in the method I used ensure all things would be equal. I basically would fill the measure and tap it 4 times until full, then move the cap to level it off, then weigh the charge. The scale was calibrated.
I did talk to Western Powders, they basically said that all black powder is measured by volume and they appreciated my approach, but as long as what every measure I used, 120 grv was to be considered max regardless to what it would weigh.
Here are my results;
Load Data From BH209 = My data
90 grv (63 grw) = 70 grw avg
100 grv (70 grw) = 77 grw avg
110 grv (77 grw) = 84 grw avg
120 grv (84 grw) = 91 grw avg
Any comments would be greatly appreciated.