I will bow to Robs knowledge of guns HB!
Its just that I would have thought a blow to the head causing that amount of damage to the stock would have killed Nevill,let alone knock him out!
At what stage do you think the blow was made to Nevill that damaged the stock so badly?
When the struggle took place, i think Neville obviously took the four shots upstairs and it weakened him, Bamber had ran out of bullets or he would have finished him off at this stage, Neville made his way downstairs to either arm himself or make a phone call, or to stop Bamber reloading, that's when Bamber used the rifle as the the weapon to attack him.
Neville defended himself with his arm from the rifle being used like this and would have been retreating, i think the last hit was the one to the head as Neville's arm defence weakened and left him exposed was the point the stock got damaged, either hitting his head or a follow through and it hit the floor, and it severely stunned him, to the point he had to sit in the chair, Bamber then had time to reload and finish him off in this position? Anyway, roughly that's my opinion, i could obviously be wrong