I can't remember if I asked this before, but what's the reason for choosing a 25mm gun over the 30mm gun, in the RAN? Is it purely logistics? It's what we have at the warehouse, so we'll keep using them until they wear out, and use up all the 25mm ammo?
There's a video on Youtube, that several including ngatimozart, in the previous RAN thread, comment number 29,327, linked, which shows the 30mm gun causes 9 time more damage than the 25mm round, and 500m more range. Not to mention there are more types of shells now
https://www1.gov.au/project/phalanx-close-weapons-system-block-upgrade Not sure whether the time frame for the upgrade has been posted here or not. Currently only 2 upgraded systems have been fitted, Sydney and Supply. 4 more systems should be back by now awaiting fitting and Hobart and Brisbane...
www.defencetalk.com
(yes, I searched 25mm guns and went through the 10 pages of listings)
The physical and cost differences between the two seem relatively small, compared to, say, 30 and 40mm. So aren't there 3x 30mm guns on say our Canberras, vs 3 x 25mm guns?