A lot better
I'd push everything up a little, as I underestimated packaging weight in general (due to early focus on reduced packaging ammunitions in German Horse drawn artillery/infantry), and underestimated the general packaging weights on Sep Loading Powder (this is x2-x3 as a minimum, and powder weight is ) - not a factor for small LV weapons, but becomes burdensome for Gun-How or larger calibres.
Still working my way through the available data again. Should have something more definite to say in a bit - first estimate -
large calibre How rounds ~x1.5, Gun x1.75
med (75-105) calibre How rounds x1.6, Gun x2
med (50-75) calibre How rounds x1.7, Gun x2.5
med (30-50) calibre How rounds x1.6, Gun x3.5
SA & Light Cannon x3
Mortar x1.25
German packaging, in common with mountain and airborne forces that rely on horse/man portage is more minimal... the bulk of the increment is in the case/propellant so changes are minimal, but you might want to consider dropping the multiplier by 0.2 for the medium calibre rounds, perhaps a little more for small cans. Small arms is fairly 'fixed' at x3 though for HV ammunition - belted a little higher, but clip/loose is mostly just a matter of increased bulk. LV
may be x2 or thereabouts.
For 'Gun' weapons where the case is fixed, use an average weight of max and current
for that case when calculating packed weights - while a APDS projectile is half the weight of an APCBC projectile (roughly), the packed weights are 3/4. The same principle applies to light weight HL or HE rounds.
Note that in the data some APCR types have extreme projectile/complete round weight ratios - sPzB41 is over 6.7 in APCNR configuration, and still 4.8 in the 'low' velocity HECNR.
You realise that at a stroke we may have roughly halved the logistic effort available [:D]
