Regardless of whether GA arms are or are not new loads, that is what was recommended on the Clark custom website and that is what I have right now. A friend had a small amount left over. Georgia Arms 185 gr JHP. BTW it says "new ammunition" on the label. At this point I am unaware of any of the big compainies loading for the 460 Rowland, please let me know if I have more options.
Anyways, I got to go to the range for a very short period of time last night. Only had about 10 minutes before they closed, so I only put two mags thru the kit.
Accuracy was very good, but the range is only 50 ft so I'll try to get to an outdoor range for a better indicator on how well I can shoot this round. I tend to be a pretty crappy shot with my 44 mag revolver, so far it seems that I have much more potential with this set up. Muzzle blast and recoil were less than I had anticipated, and seemed on par, or less than, the 357 sig that I have shot.
The first mag ran flawlessly until the last round, which stove piped upon ejection. The second mag had 2 FTE. This AM as I was loading up, I slapped in a full mag and hit the slide release. The gun jammed the first round into the top of the chamber. I cleared that, and the next round chambered fine. At this point, I am using the stock 7 rd Kimber mag. I am going to try Wilson and McCormick Power Mags before I start messing with the gun itself.