The 394 shot incredibly accurate (.184 group) however it is very long. I asked Steve if he could make a shorter bullet so it didn't take up so much case capacity. His answer was a 370 Hammer. More aggressive secant ogive and a slightly longer boat tail with a added drive band. Testing has been interesting. The gun loves the bullet seated deep which is the total opposite of all the other bullet/rifle combos I have. We tried 2 seating depths so far. One with the drive bands seated in the case, and one with 2 drive bands out of the case. Between the 2, the deeper seated bullet showed the best accuracy. We did notice that N570 was too slow in the 28" barrel. The 121 grain charge showed pressure and signs of not using up all the charge. Velocity was terrible. We decided to go back to the drawing board and try Retumbo and RL 33. Just a tad bit fast powder might make all the difference.