Hello Deadeye!!!, first I'm going to clean the chamber very well and see if its just grease from H&R that is the culprit, then I plan on shooting it with .357 ammo and checking it's out of the box accuracy. I then plan to clean the chamber again and retry the .360 brass. At that point (right now it is my plan anyway) I was planning to ream as little as possible from the chamber to make it a .360 DM and not a true .357 Max. Then to retest for accuracy and pressure signs with a short throat, if all is well it stays as it is then (hopefully). It looks to be a long fun project!!! I don't know if you saw my post but I got the 30 cal bullet mold about 2-3 days ago!!! I have not and will not forget you, would not want to get you upset, I hear you can shoot!!! If you saw the thread or not about a get together at my camp in Maine, you were invited. If things don't work out I will get the brass back to you. If you need it now I am willing to return it to you immediately, let me know. About bullet selection, I think cast bullets will work fine if the velocity is kept down, add a CG and you could boost the velocity a bit more. I thought I might use a good jacketed soft point bullet for hunting in the .357/.360 so the Micro groove should excel...<><.... :grin: