If the superbolt is almost 1/2 the weight....

[kilaueakid]

than wouldn't it be possible to have a bolt spring with less tension? The bolt would not need as much force to push it back to the sear? Also maybe a lighter spring would allow the bolt to stay forward past the breech a fraction of a sec longer to completely eliminate blowback. I know the superbolt has less blowback now, but there is still some.
kila

[Minimag4me]

it would have less kick too, the return rate would be slower but not slower than a regular bolt. Its an interesting idea