Yep, and the 120's were still in the testing/production phase and never got to the Cat.
 
	I'm an old tanker and we had M-48A5 trying to plink targets with the 105 we knew our "Ah <profanity> Ranges". 
 
	When we got the M1A2's with the 120 smooth bore the standoff changed, but the tactics were the same