Nid's were brought out to replace flues because they were not designed to handle the newer, higher pressures. Without a certain knowledge of the pressures B&P generate I would not. Sure you could get away with a few, if the gun were in solid condition, but how many might be interesting. And interesting is not what you want when you are shooting.
If you reload there is a group of 16 reloaders who have a fairly extensive number of lower presure loads that they will share with you. Easy to find at 16ga.com.
