Some years ago, I bought a Neil Jones gauge - it measures base thickness. Sorting the very cheap, junk bulk ammo showed a slight accuracy improvement over unsorted ammo, but it was still very tedious work and not worth the effort. Buy better ammo to begin with. CCI SV is pretty good ammo for the price. I'd really doubt any benefit to weighing ammo. You'd have to weigh a lot of it and fire many groups with an incredibly accurate rifle to come up with a credible conclusion. Any accuracy advanatge would probably be insignificant.
