Thompson Center Arms .45 rifle

[Beartrak]

The regulations on real BP are really stringent on the supplier.
It must be kept in a magazine out of the public's reach. The magazine must have an inventory 'inside' and must be updated 'each' day. Every pound of powder sold must be logged out to the buyer and the inventory immediately updated. THEN, the inventory must be updated and logged at the close of business EACH day.
Or, you can simply go to www.powderinc.com and order what you want. Just be ready for the five pound minimum order!

 

[mykeal]

Every pound of powder sold must be logged out to the buyer and the inventory immediately updated.

If by "...logged out to the buyer..." you mean that the buyer's name or other information must be recorded, that's not a federal regulation. It may be local requirement where you live, but none of the retail stores that sell real bp in Michigan (that I've been to) have ever done that. They do keep track of inventory on a log in the magazine, but there's no buyer information in that log.

 

[BigPapa4147]

I've been reading through the manual on TC's website and it says to only use black powder or pyrodex. My friend told me I should use 777 powder because it's more consistant. My Hawken is from the 70s and I was wondering if 777 is safe to use.

 

[arcticap]

From the TC manual:

NOTE: The loading data found in this manual was compiled using
Black Powder or Pyrodex as a propellant. With any other approved
Black Powder substitute follow the instructions supplied by the manufacturer
and heed all warnings as they apply to loading and usage
of that product.

Make no mistake about it, Black Powder or an approved Black
Powder Substitute such as Pyrodex® are the only propellant powders
that are safe to use in a muzzleloading firearm.

http://www.tcarms.com/assets/manuals/current/Shooting_TC_Side_Lock_Black_Powder_Guns.pdf

777 is safe to use. For equivalent loads, measure and load 15% less volume of 777.

Some folks find that it's less consistent and some folks find that it's more consistent.
It's advisable to not compress the powder charge too much when ramming the projectile. Load consistently each time and work up the most accurate load by adjusting the amount of powder. Start with a low powder charge and work up in 5 -10 grain increments until you're satisified with the results.
Sometimes folks need to experiment with the patch thickness or lube, the size or type of projectile, the amount and brand of powder or whether to use an over powder wad or not.
After seeing some results then you decide if 777 shoots more consistently in your rifle.