Interesting how vehicle with open loader space still have 2 front armor. Maybe it should more often get weapon critical hit
Loading is internal, as has been said a few times. Uses an autoloading system that requires the gun to be pointed to its 12 o'clock.
Which means low RoF and that the gunner must aim again after each shot. T-62 had a similar problem. The cartrige was long and their was an automatic cartridge ejector which ejected it on the outside without breaking the NBC protection. The problem was that the gun had to be elevated after each shot, lowering the RoF and the gunner had to reaim each time. That was the price of placing such a powerful fun in a so small turret.
P.S. : Yes I hate the VTS1 with a lot of passion.