I have the 597 HB, very accurate. The 10-rd magazine is good. But I have some minor feeding issues with the 30 rounder. LRHO feature is hit-and-miss with the 30 rounder. I am looking to test a Promag 22 rounder if I can get one. I just installed an Archangel 556 stock and it looks better now. With a cheapo Tasco Red Dot to which I am planning to replace with a 3-9 X 40 scope with quick release mounts, I am satisfied with the 1" grouping I am getting @ 20 m standing position. One hole is possible when bench rested or with a bipod. Before you buy, make sure you are comfortable with the weight. A regular 597 is lighter compared to the 597 HB. Recommended upgrades: VQ hammer, Extractor and springs.