What is the difference between canister lots of gun powder, and any other type used today, for either commercial or military ammo? I do not reload, I prefer Hornady or Federal ammo for my CF rifles, and Federal or RST for my shotguns. Hansie
Hello Hansie Bloeckmann,
Shortround6 covered the general idea pretty well, but there is a bit more that I was hinting at with my prior post.
Commercial / Military factories buy a lot of powder, test to see variations as Shortround6 described and then use it up. The chances are pretty good that if the factory makes many different calibers, the powder will be suited to at least one caliber.
There are many more powders that are used in industry that are not available in a canister grade; there are probably at least a dozen times more non-canister powder types. Sometimes even a lot of powder made with the process that is used for a branded canister grade powder does not end up meeting ALL the pressure tests and is sold as non-canister lot.
As an example of the kinds of pressure testing that a canister lot must pass, I will use Hercules Blue Dot.
(The description is hypothetical of course.)
Blue Dot is a powder that is suitable for a wide range of pistol cartridge applications.
It can be used in medium-low pressure pistol rounds, and even fairly high pressure pistol rounds.
Let's say that this lot of "Blue Dot" works fine in loading the .45 ACP and .38 Special standard loads with pressures and velocity as expected.
Let's also say that this lot seems to have some inconsistencies when loading for higher pressure rounds such as a .357 Magnum or a .38 Super or a 9 mm Parabellum.
It should not be sold as canister grade because it cannot meet all of the applications that are claimed for the product but a factory would have no problem with it.
As stated before, this is just a hypothetical story to illustrate a possible situation. I actually find Hercules (now Alliant) Blue Dot to be a very useful product.
As another example (real this time), Winchester W846 was used in military .303 British loads and also eventually for 7.62 NATO ammunition.
After the end of WW2, Bruce Hodgdon bought a mess of this powder and marketed it as BL-C(2) for reloaders. Of course it is no longer a "Ball Powder" because that is a Winchester trademark, so it would be called a "Spherical" powder instead....
The background of some of this stuff can get pretty interesting but I would suggest never to get too creative when reloading you own ammunition. That is why I pick a powder that well suited for the purpose and a velocity that can easily be achieved without a maximum load and just leave it at that.
By the way, regarding double base powders in military .30-06 loads, perhaps I didn't dig far enough last night.
Apparently Hercules HiVEL 2 was used in some years'.30-06 match loads between the wars with pretty good results and I believe that was a double base powder. During the Great War, apparently Pyro DG was the typical rifle powder for .30-06 loads. There were quite a few other propellants used until they settled on IMR 4895 in the late 1930's (from what I have been able to find).
- Ivan.
- Ivan.