Stuff maybe boring stuff
Apr 5, 2009 2:54:12 GMT -5
Post by rbinar on Apr 5, 2009 2:54:12 GMT -5
8-)We had a post on the bulk density of powder some time back. Since then some new toys have come through the door. A new quick reading scale and precision volume measuring system allow me to play with the powder measurement again.
You may ask why worry about it? I'd say unless you're a nerd (like me) you don't need to know. For those who read "a brief history of time" (by my hero Stephen Hawking) this might be of some use.
Bulk density helps me with problems without me having to make or have you make measurements. There will never be a way to do it all in numbers because I can't tell everything about a barrel in Carolina from Arkansas. Bit fewer physical measurements makes it easier.
For instance with a good bulk density I can tell a 65 grain load of Xmr-2015 will be 1.78" long in a 45 caliber without a recessed breech plug. That same load would have a chamber size of 73.77 grains of water. If I knew the usable barrel length I could then know the expansion area. A 23.25" useful barrel would have a expansion area of 13.06
If all that is mud on a rock so be it. But I have this stuff and it could be of some use to someone even if I don't know who. The following is a list of powders followed by two numbers. The numbers are the weight of 1 cubic centimeter of that powder in grains and grams. The weight in grams can be considered the bulk density for conversion because 1 cubic centimeter of water weighs exactly 1 gram.
That's where my new scale came in handy. It weighs in grains and grams. So to get the data all I had to do was measure a volume of powder and weigh it in grains and grams and divide by the volume. It's pretty easy if you use 10cc.
Imr-SR4759 11.16 grains .723 Grams
Imr-4198 12.88 grains .834 Grams
N120 13.37 grains .866 Grams
N130 13.55 grains .878 Grams
N133 13.09 grains .848 Grams
Xmr-5744 13.81 grains .894 Grams
Xmr-2015 13.60 grains .881 Grams
Reloader #7 13.70 grains .887 Grams
Reloader 10X 14.11 grains .914 Grams
H-4198 13.39 grains .867 Grams
H322 14.02 grains .908 Grams
Benchmark 14.06 grains .910 Grams
Varget 13.85 grains .898 Grams
If you have other powders to add I'd like to see some entries. If you have bulk densities from another source I'd like to see it as well. I have others but they are normally too slow for our use.
You may ask why worry about it? I'd say unless you're a nerd (like me) you don't need to know. For those who read "a brief history of time" (by my hero Stephen Hawking) this might be of some use.
Bulk density helps me with problems without me having to make or have you make measurements. There will never be a way to do it all in numbers because I can't tell everything about a barrel in Carolina from Arkansas. Bit fewer physical measurements makes it easier.
For instance with a good bulk density I can tell a 65 grain load of Xmr-2015 will be 1.78" long in a 45 caliber without a recessed breech plug. That same load would have a chamber size of 73.77 grains of water. If I knew the usable barrel length I could then know the expansion area. A 23.25" useful barrel would have a expansion area of 13.06
If all that is mud on a rock so be it. But I have this stuff and it could be of some use to someone even if I don't know who. The following is a list of powders followed by two numbers. The numbers are the weight of 1 cubic centimeter of that powder in grains and grams. The weight in grams can be considered the bulk density for conversion because 1 cubic centimeter of water weighs exactly 1 gram.
That's where my new scale came in handy. It weighs in grains and grams. So to get the data all I had to do was measure a volume of powder and weigh it in grains and grams and divide by the volume. It's pretty easy if you use 10cc.
Imr-SR4759 11.16 grains .723 Grams
Imr-4198 12.88 grains .834 Grams
N120 13.37 grains .866 Grams
N130 13.55 grains .878 Grams
N133 13.09 grains .848 Grams
Xmr-5744 13.81 grains .894 Grams
Xmr-2015 13.60 grains .881 Grams
Reloader #7 13.70 grains .887 Grams
Reloader 10X 14.11 grains .914 Grams
H-4198 13.39 grains .867 Grams
H322 14.02 grains .908 Grams
Benchmark 14.06 grains .910 Grams
Varget 13.85 grains .898 Grams
If you have other powders to add I'd like to see some entries. If you have bulk densities from another source I'd like to see it as well. I have others but they are normally too slow for our use.
