I'd just like to add a little to this thread.

Of the top four people that shot in the 5702. 100y/200y/300y GRCF competition at this years Phoenix 3 of the 4 shot using Balzer .357 mag 158gr JHP rounds in the gold and blue box, at about 1650 fps. That's the 2nd, 3rd, and 4th placed shooters and with only 5 points separating the top 4 shooters with scores of 107, 105, 103, and 102.

No reloading allowed over here in Ireland so we have to use factory ammo.