I saw a proto type LEO at General Dynamics Land in London about 2 years ago, yes it is impressive
Some unique things I noticed
- can fire APDS
- can fire LAHAT through bore missile (counter Attack Helo's as well as guided direct fire against surface targets)
- carries a lot of ammo (without an auto loader I think it was in the neighbourhood of 60 rounds all types)
But it has only limited long range indirect accuracy, a course correction fuse may help, a bit, but it still hits the wall (so to speak) at around 30 km. 155 is going out past 40 now, and with Excalibur, very accurately.
Some of the values they associate with accuracy on their glossy is suspect, for example comparing it against the M549 RAP, which is pretty much obsolete. The lethality is missleading too, yes there may be lethal fragments out that far, but how many; what's the likelihood you're going to hit someone? Telling is the reduced safe distance. So some of the fragments may carry further, but there won't be as many of them (relative to 155)
But Denel does not just push the 105, they also push the 155 type as well and this makes for a more reasonable comparison
http://www.dtic.mil/ndia/2003gun/pride.pdf
M777 has the potential to use that ammo.
BTW our old M109s can fire Excalibur, but not with the higher MAC charges (to try and go back to the thread).