When IRL change came from 20 to 30 rounders for M16 during Vietnam number of mags issued per soldier did not decrease, only total amount of ammo carried increased. Also British issued 5 x 20 rounds mags for older L1 rifle (FN-FAL - that is real life Armageddon pattern autogun ), while they issue 6 x 30 rounders for L85...
Big appeal of lasgun is that a soldier can easily carry double or triple load of autogun ammo, not that he can carry same amount of ammo for less weight (soldiering ain't for weak ).
Anyway, 3 (~180 shots) is definitely low for soldier cause ATM soldiers in Afghanistan are carrying 8+ (240+ rounds).
I would say that reasonable load for a soldier would be 5+ mags (300+ shots), giving him quite an independence from a logistics.
OFC, if he is carrying all those mags then none will have any mistake that he is military personal (or high-class mercenary), so forget about any undercover work (except in Guard ).
Also concealed carry, what you can carry inside spring clothes and remain reasonably unnoticed (no casual observer would notice):
15-rounds 9mm pistol (that is stub-automatic with extended mag in 40k terms) with 3 reserve mags (60 rounds total) in shoulder holster.
6-9 rounds backup compact pistol (compact stub automatic) with 1-2 reserve mags in belt or leg holster.
You can not realistically carry autopistols hidden (based on weight they are sized about same as Ingram MAC-10/11 which looks like was inspiration for 40k autopistol) except under trench-coats, but you can easily carry 4-6 mags (mags are usually 15-30 rounds) for it.
So IMO, rather by 3 mags, set fixed number of shots for undercover carry (under trench-coat, this is 40K after all ), say 60-90 for most stub automatics/autopistols etc, 30-40 for hand cannons. Those are broken down in mags, so 5-shot hand cannon would carry let's say 6 mags, 13 shot stub-automatic about 5, while extended 30 shot mag autopistol would carry 3. Much more realistic, and does not make it that complicated.
For laspistol, I would say allow 4-5 reserve mags, but it is largely irrelevant as none is going to use even one full.
For shotguns, since their ammo is quite bulky and limit it to 10-15 reserve shells, or one full reserve mag if it is more.
Threat bolt weapons as shotguns, as they are about same caliber (.75" - 19mm, common 12g shotgun is 18.5mm)
For drum-mags (combat and Vanaheim shotguns and few other, I would say no concealed carry of even mags, as drum mags are notoriously bulky and PITA to carry. Plus some of those allow ammo to rattle making any attempt to sneak a parody. For those allow carry of loose ammo up the one reserve mag value, which will make reload PITA (~3 rounds), so next time player will take more suitable undercover weapon.
Edited by bojan, 02 February 2014 - 06:37 AM.