I haven't studied the Boron Nitride piston. I assume there is a reason it is in use, I would expect it to be hard and perhaps slippery compared to the normal 930 model, but I am only guessing.
I have an Or3gun kit in my 930 Tactical and it seems fine with lighter loads. The SBE seems out of stock the past 6 months, and the fancier models from Mossberg seem to use the BN piston. Does the BN piston offer any advantages over the stock 930 piston?
I finally got a chance to run some 7/8 oz / 1300fps Fiocchi slugs thru it; perfect performance. I have some OR3GUN parts in it already. Recoil was not terrible, and I shot 30 rounds sitting and standing. One interesting feature- most hulls ejected about 6 feet right and 5 feet forward of the...