Friend of mine has a Parker-Hale Enfield sporter. I am helping him get it sorted. 1) The trigger is bloody awful. Is this fixable by a gunsmith? 2) The scope mount is screwed to the side of the receiver with three small hex screws. Looks a bit dodgy, are there recommended alternatives? 3) Any recommendations for US factory ammo? My friend does not reload. 4) Any "tweaks" to help accuracy and consistency? 5) What sort of range of precision should we expect, 2-3 MOA? Thanks in advance.