First of all, having personally fired .308 bullet loads in an SKS, the accuracy was equal to the .311 bullets. Cheap gun, 4 MOA, I'd want something better for your troops,
BUT
I have personally heard firsthand reports that you can get 2 MOA or better with caliber mismatch of only .003 in either direction. Some printed sources said so to, IIRC.
Now,
“The SCAR system will be rugged, highly reliable, controllable in full automatic fire, corrosion proof ... capable of lubeless firing ... and capable of being operated and maintained by a single man,†according to the document.
Doesn't that sound suspiciously like the guaranteed-to-fail expectations the M14 was saddled with? Sheesh.
Well, M14 expectations except for the lubeless firing--that was the initial M16 debacle, before they spent a million buck$ to PIP the thing to include a forward assist and stopped spewing BS at the troops about "no cleaning required" and also cut the excess calcium carbonate stabilizer from the powder.
It also sounds like a two-caliber disaster. Sheesh.
I believe they could get everything they need by going to the 6.5 Badger, with accuracy in the sniper versions more than likely much more easily repeatable than for any .30 caliber. Going to ONE caliber sure makes more sense to me, but what do I know, I'm just a "civilian." Sheesh.
The rifle can be done, probably at 8 lbs or less minus optics. Just let's not botch it by duplicating the WWII/Korea complications of having three or more small-arms calibers.