Re: Rifle Barrel
This might be more information than your looking for.
Black Powder Grades & Equivalent Sizes (in mm)
Sporting Grades (G) Grain Size (in mm) Blasting Grades (A) Grain Size (in mm)
1FA 8.0-4.0
Cannon Grade 4.76-1.68 2FA 4.76-1.68
1FG 1.68-1.19 4FA 1.68-.84
2FG 1.19-.59
3FG .84-.29 5FA .84-.297
4FG .42-.15 7FA .42-.149
Meal D .42
5FG .149 Fine .149
1fg: This powder has the largest grains and normally is not used in firearms, but if you happen to have a cannon, this is the powder for you.
2fg: The actual grain size of the powder is smaller than that of the 1fg powder. This powder is most commonly used in larger bored rifles starting at about .45 caliber and up.
3fg: This powder has an even finer grain and is used primarily in pistols and small bore rifles of up to .54 caliber.
Note there is some overlap between the uses of 2fg and 3fg. My personal preference, and I make no claims that it will work for everyone, is 3fg powder in pistols and all my rifles up to .50 cal, and use 2fg in all larger calibers.
4fg: This is the finest powder and is usually reserved for use in the flash pan on flintlock rifles.
Tirediron
Charlie P. (NY) said:
You could narrow down the age by determining when the stencil cutter was invented. I'm thinking the 4/9/77 is a date. 1977. Maybe 1877, but it looks to be in too good a shape for that.
The "G" added to black powder wasn't used until DuPont started adding graphite to it for milling ease. Way later than 1777.
In the Navy and Artillery a "rifle" can mean a cannon with a grooved barrel. (i.e. Parrot Rifle)
I think I agree with Charlie in that the wood, condition, and stenciling don't look that old.
It looks more like 1977 to me. The "Stencil Cutter" was first invented and put into use by most Militarys in about 1893-1895. I also think they started using metal lined containers pretty far back with a securable lid. If the lettering does refer to "12 Gross" I don't think that would have any reference to Powder of any type. In the Canadian Military the term "Rifle Type C7" referes to the Colt M16 style rifle the U.S. Forces have been using since the late 1950's....but the Canadians didn't adopted till 1984?
Just my usual WAG.