Ordinance Identification

[CINDERS]

I think the point here is the Army or Ordenence section will call it 155mm not 154.94" imagine a FOP calling in "20 rounds H.E 154.94mm, Fire for effect." 155mm rolls of the tongue allot better besides rounding up & down has been with us for eons and unless some Arty types can conclusively identify the projectile we could go on for ever and a day trying to surmise this one out.
Allot of the stuff used is heavilly stencilled denoting it designation they would never put unidentified ordnence out to the troops which could lead to a calamity surely!

Found this on Wiki; which I think pretty much settles it I'm out........................
The M107 155mm projectile was the standard 155mm high explosive (HE) projectile for ... (12.7 lb); Length (excluding fuze): 605.3 mm (23.83064 inches); Body diameter: 154.71 mm (6.09027 inches); Driving band diameter: 157.98 mm (6.219666 inches);

O P's measurememnts they took match this bang on I would say at 6" and 23.75" base to tip (minus fuze) I took it to the nth degree with decimal places so there would be no quibiling about "Well its not quite.........!" God forbid that the body diameter is under 155mm and driving bands take it to over 155mm in diameter.................................