Interesting, so its more of a question of if you want a single squad with higher DPS or to spread it out over two squads.
I'd like to know how much of a DPS increase RET Carbine -> BAR is compared to Garand -> BAR is. That is, if you get more out of your 60 MU short term if you upgrade the RET. Of course this would have diminishing returns the longer the hypothetical Rifle squad is at Vet 3.
vet 0 Rifles w/ 1 bar
close: 23.524 + 10.479 = 34.03
medium: 11.344 + 5.656 = 17
far: 5.824 + 2.950 = 8.774
vet 3 riflemen w/ 1 bar
close: 30.5812 + 13.6227 = 44.204
medium: 14.7472 + 7.3528 = 22.1
far: 7,5712 + 3.835 = 11.406
vet 0 RE w/ 1 bar
close: 11.397 + 10.479 = 21.876
medium: 2.265 + 5.656 = 7.921
far: 1.125 + 2.950 = 4.075
vet 1 RE w/ 1 bar (+20% accuracy)
close: 13.676 + 12.574 = 26.25
medium: 3.15 + 6.787 = 9.937
far: 1.35 + 3.54 = 4.89
vet 2 RE w/ 1 bar
close: 18.234 + 12.574 = 30.808
medium: 4.2 + 6.787 = 10.987
far: 1.8 + 3.54 = 5.34
keep in mind most firefights occur in the medium range category.