Further to the above.
As
@Kirkhill likes to quote DR, and you go to war with the Army (Military) you have, not the one you want.
I would suggest that it makes sense to get the Military you want before rounds start flying.
So back to the C3 replacement;
What makes the most sense for the CA?
I don’t think a 105mm does, simply because the range limits.
Quite frankly I think the RCA PRes is a mess, even without the C3 issues. When the RCHA went (back) to 155mm, what did the C3 do? A trg gun
In the current day, with digital FCS, pretty much all actual requirements of a training gun can be done with simulators, combined with some live fire training.
Which means that the Armories really don’t need to store howitzers etc. Other than units who have ceremonial salute functions, which don’t need to be done with live guns.
Manpower is an issue for the PRes, so what combinations make sense?
Frankly I’d see HIMAR make a lot more sense for a lot of the units - it’s a truck with a pod.
The simulators for it are pretty solid - and the vehicles could be centrally based at training centers. I think 3 Reg’t of 18-24 HIMAR’s each would be a pretty solid addition for the CA, they don’t take a lot of bodies (other than the ammo train) and have multiple payloads.
It’s not really a CS system - and there needs to be something for the Bde Maneuver units, beyond the limited M777’s in the RCHA/RALC.
Shifting the M777 to 2 Bde would allow PRes Ont units to support 2 RCHA with 3 8 gun Bty’s
Then get ~50 ish M109A7 for 1 and 5 Bde
Use the Quebec and Alberta PRes Arty for bringing up gun numbers for them at 3 8 gun Bty each.
That leaves the rest of the RCA units for GBAD, and STA - and I’m not sure that STA shouldn’t be it’s own trade in the CAF due to the bleed into ISR/JSTAR