Finally got to shoot this at 30 yds yesterday after helping my dad zero his .243 for dsc1 exam (had a few shots myself and was surprised at how little recoil there was).
Groups started at about 3/4" but I managed to reduce this to about 1/2" after a few tries. All misses quite clearly down to me so a bit more practice and I should be able to get that down to 1/4".
Before I started all this tinkering it was more like an inch at 15 yds.
Incidentally fitting a Rowan extra setback trigger has also made it a lot easier to use, would recommend for every HW.