"Don't think you will do any Front door/back door CAS with the size of the frag area of the 16"."
LOL, i don't think so either.
"As far as special coordination, the FSC/FSCC the rounds that M21 suggest, RAP/SABOT/SCRAMjet would all be treated like artillery RAP and Illum. Have to make allowances for RAP motor failure. No troops within the DC zone for rocket failure or beyond that. So RAP and Scramjet would be theater level targets only."
Agreed. Scramjets especially would be theater level assets just because of their range and lethal radius. And you wouldn't want to drop a scramjet projectile any closer than a minimum of about 700 meters to friendlies.
"This is also the reason that we use to prime the Copperhead target with command det charges at Ft Sill. Copperhead use to miss so much for the D&P shows that when the announcer said "Observe the XX tgt at XX Direction. The finger would be on the switch. Generals like to see a "Boom" when its suppose to happen. No "It didn't track", "Fin didn't deploy" ect...."
The Marines did that too eh?
"155 & ERGM 72 DPICM"
Just a FYI, the ERGM warhead has been redesigned to a 27lb unitary(anyway, that was the last i heard).
"I disagree with M21..."
There's a first.
"All the BBs mags will not be filled with ICM shells"
No, probably no more than 20%, or 260rds per ship.
"and more than 1 M270 will be in theater."
Most certainly, but at any one time no single Bn TF is likely to have more than 3 ATACM equipped SPLLs tasked(1 MLRS battery, 6 ATACMs), if even that.
ATACM is normally employed as a Bde CO's personal shotgun.
"16" Mk 144 400 APICM (Bouncing betties)"
You forgot to mention the other operational 16" DPICM shell, the Mk146, which contains a mix of over 500 Mk24 and Mk46 submunitions.(not sure on the exact count, sorry- it's probably on the USNFSA site)
"Instead of shooting 2 ATACMs they can shoot 12 regular rounds that are guided and have 244 more, and better submunitions."
If within range, of course. Also, as you pointed out the 16" Sabot round is notional, so one would assume that they'd use the latest CEMs.
"So throw weight goes to MLRS, especially if there is a batterys worth."
Actually the FFE effectiveness advantadge would go to the Iowa if firing Mk146 ICM shells(slightly over 500 M42 and M46 munitions per). One 9 gun salvo of Mk146s delivers about 4600 submunitions simultaneously, whereas the MLRS- even ripple firing- would require about 30 seconds to fire it's full 12rd magazine.
"As far as getting 16". Even during WW2 it was used as pre invasion bombardment."
And a deep interdiction weapon.
"Then the ships would pull closer and use the 5/38s for direct support and 16" for what would now be called battlefield interdiction."
LOL...guess i shoulda finished reading your statement.