Higher pressure Black powder loads?

[Freyr_255]

I've sort of been toying with running some black powder 45 colt loads in my 454 casull guns and it got me wondering the limits of black powder in a firearm. Do compressed loads or finer grained powders(fffg or ffffg) cause far too much of a spike in pressure or would one be able to load up 'hot' black powder rounds in this fashion?

 

[Skinny 1950]

You don't want air space so either fill the cartridge with black powder (Goex FFFG) and allow enough space for the bullet to seat with slight compression or for lesser charges use a filler wad (nitro card) so the bullet compresses the wads and powder.
If you load smokeless as well make damned sure you don't load the wrong powder!!!
Here is a picture of a full load (Goex FFFG).45 Colt from a 1873 clone:

 

[starpuss]

:

DAM! i would not want my face by that!!!

 

[hk33ka1]

Assuming you are using ffg or fffg Black powder I don't think you could put too much powder in a cartridge with a quality safe firearm. Priming powder or air space might lead to problems in any gun.

 

[Freyr_255]

You don't want air space so either fill the cartridge with black powder (Goex FFFG) and allow enough space for the bullet to seat with slight compression or for lesser charges use a filler wad (nitro card) so the bullet compresses the wads and powder.
If you load smokeless as well make damned sure you don't load the wrong powder!!!
Here is a picture of a full load (Goex FFFG).45 Colt from a 1873 clone:

Looks like fun

I guess what I'm wondering is if you pack the powder in fairly tight will it cause problems? And on top of that whether or not FFFFG would be safe to use in strong firearms or would it be too explosive?

 

[hk33ka1]

I would NOT use ffffG inside a firearm or cartridge. It is for priming pans on matchlock/flintlocks only.

I pack the powder (ffG Goex) pretty tight in my .45/70 as do most and have no issues.