I have four 17hmrs, a Marlin 917V and 917VS, both with Rifle Basix triggers, a CZ452 American with an AS adjustable sear and a Sportster with a good 3lb trigger job, they all shoot under 1" with their preferred ammo, the 917V shoots best with the Federal 17gr Vmax, the 917VS likes Hornady Vmax, the CZ shoots Speer TNTs best, and the Sportster likes Remington ammo.
My huntin partner has a 917V also, his shoots the Federal Vmax even better than mine, the last 100yd 5-shot group he shot was one hole that measured under ¼", he's a better shot than me on any given day tho!!
Tim