HE, you might note that there has been a good deal of research on use of nitro powder to duplicate BP loads. Pressure being the issue for the action and barrels, high quality loads have been developed for both commercial loads and for reloaders. Both are now commonly available and commonly in use. Most of the "common knowledge" about BP pressure has turned out to be generally mostly wrong. The pressure vs time and pressure vs displacement curves for nitro and BP are not nearly as different as we had been lead to believe. Mostly, it is a matter of using loads of known low pressure.
Last edited by Rocketman; 06/14/10 11:11 PM.