Breach Plug
I do my own pressure testing and set my own limits, I only state what I am doing I do not suggest that others do the same. I will say that since a few guns with poor barrels blew up in some peoples faces some years a go that the powder companies have set there recommended limits so that even poor barrels can hold the pressure.
I will also say that I find Blackhorn to have a longer lower pressure peak that gives higher velocities when you push the pressure to the same levels.
To give you a better handle on what I am saying 100 gr of 777 gives the same peak pressure as 115 gr of BH.
I do not suggest anyone do as I do. I do as I please and except the responsibility only for my own actions. Lee