Mvincent: Thanks for the input.
In 5e CoC, should it be p36 out of pages 32-36 (Combat?); Or is it p113-114 (CoC 7e?)
As I stated in my original post:
"I later read through CoC 3e, 5e, 6e, and even 7e; but nothing on missile/ballistic weapon in touch range; until I came upon a paragraph in G.O.R.E. (D100), which some people should remember. Generic Old-school Roleplaying Engine.
On p32 (G.O.R.E.), it states: Note that if range is touch, missile weapons cannot be used."
I suppose I use G.O.R.E. as a SRD of sorts, concerning D100 system.
I can see the rules in 7e about a 'disadvantage dice for firing in to a melee, but what I was trying to get across to the player, and the others in the scenario, was the player (carrying a hunting rifle, 42 inches-3.5ft long), was too long to use to shoot back at a target who was in touch range (about 12 inches-1ft away) from him.
There was I explained to them, no 'manoeuvring room' to get the long arm to shoot at the target, as it was too close.
I explained to him he could use the stock to swipe at the target, as an improvised club to push it away, but not fire at it.
As Soltakss said "Why not push the attacker away and then shoot? The rifle could be used to help push away.".
Which I suggested to the player, but, no go.
Th target was much closer than the 'business end' of the weapon, I told the player; but alas, not accepted. I'm thinking of accepting the rule on p32 of G.O.R.E.
I have a feeling it won't be popular with some players, but it seems logical (not using missile weapon in touch range).