Yeah vinny he's very helpful, I emailed him, and he thinks the same it could be seals, as there's not much difference in fps in both caliber kits.
I just wonder how it's gone from hot to 10m just by cleaning and fitting a new kit, with no obvious signs.
Walther Lg400 Red/Nightforce nxs 2.5-10x24 mil compact/Mick Troman Reg mod/floated barrel/Rog stripper/Tec Hro carbon cheek piece/carbon fibre forend...
Walther Lg300 dominator/Dutton tune/custom laminate stock/mec 3/Sightron s111 10-42
2014/15/16 Scottish Team