Grouse, I'd say it's you that acting like the "JR" here, seriously. People duplex smokeless and bp in low pressure cartridge guns all of the time. Does that somehow make the overall pressure more than the max pressure of the individual powders? not on your life. I would venture to bet that the TC warning against mixing powders is referring to mixing smokeless into the bp or sub since they talk about the danger of using smokeless right before they say it.
Also badmouthing CVA gets a little old; when was the last time that you heard of a CVA blowing up? The ones that I ever read about were from years ago and Randy Wakeman was the one broadcasting it. They sell thousands of rifles every year and you don't hear a peep about safety issues. They may not be made in America, but they obviously shoot very well and many people are very happy with them

Also it doesn't "defeat the purpose of blackhorn." The only benefit that BH has really is that you don't have to swab between shots, if you think 5 grains of 777 or AP is going to change that you're crazy.
I don't post as much as you other guys but I am on here several times a day, everyday reading and checking out new posts. There has been way too much bashing on here lately!! I own a knight, a Thompson center, and a CVA. They are all great guns. My Accura is just as accurate and as safe as my knight and MD has shot groups with his that I can only dream of...So please, lets stop the peeing matches over brands.

josh...just josh,

Unfortunately i was at the hospital a year or so ago when a CVA blown up. How or why i dont know.

As far as mixing powders in a cartridge gun, i'm not familiar with those at all. But i will say, all the powder companies are completely against it. And yes, i have talked to several companies.

As far as Knights and T/C'S, CVA'S, Savages and etc. This thread was about mixing powders and nothing else.

5grns of pyrodex for example will corrode and suck moisture way more then you think. And it will also offer different flash points and pressure spikes when not used consistently or when it's mixed in differently as a igniter.

I have never duplexed BlackHorn 209. I like that powder, but in all honesty, it scares me a little. Powder like this should not be so good. I am a believer to use things the way the manufacturer says, and you will be all right. One reason I still shoot my old CVA Staghorn instead of leaving it on a shelf because of all the hype about them blowing up.

Now I have used black powder to set off other powders. In a flintlock for instance I was using a little black powder to set off Pinnacle 3f. And it worked real good.

Also there are companies that suggest a little black powder under a pellet will help ignite the pellet in such rifles as the PA Pellet. But I always felt if that is what was needed to get positive ignition, then why not shoot the real stuff.

For another thing the sidelock used here is not even approved for use with BH209. Use the powder in the guns it was intended for and how it was intended to be used. If someone thinks they know it all and are willing to take the chances that is their right to do so but they shouldn't post it on public forums, it could cause someone to damage their firearm, get hurt, or worse. As much as the guy drives me nutz I really hope he doesn't hurt himself because he is treading on a dangerous path.

BH209 isn't approved in a sidelock because it wont go off, not because it would be dangerous. BH209 isn't some magically powerful stuff, it's very comparable to triple 777 which people (myself included) use in sidelocks all of the time. The manufacture likes to claim that BH produces way higher velocities than the competition, but every test that have seen BH is only 10-30 fps faster than the same load of 777, if not less than that.

There absolutely is merit in doing things the way that the manufacturer says, but as MD says the BH guy says that it should be fine. It's an interesting test, nothing more really.
Grouse, I didn't know that you were put in the hospital by a CVA, I can understand way you have a sour taste about them now.

Do you know for a fact that that is the only reason it is not approved for sidelocks or are you conjecturing that? I know it is not approved for certain inlines and that is not because of ignition problems it is because it blows the 209 primer apart. Ask Cayugad, he has had to dig part of a primer out of his face. So we see it does not act exactly like triple 7, the pressures develop differently.

I had that same problem the first time that I shot BH out of my knight using the primer discs. It blew part of the primer back at me. I suppose that I am just assuming that it would work fine because it produces similar velocities to 777 so I would think that the pressures would be close too, but I forgot about the primer instance....maybe it does build pressure faster?

I wasn't, a guy i dont know was. His buddy claimed it wasn't double loaded??????? But who really knows.