I only played Gridiron yesterday, but I hopped between several different lobbies, and nearly everyone was using the Snub for nearly all scenarios.
I was killed by someone yesterday, and it said they did 100% damage in 4 shots. Unfortunately it did not show the killcam, so they could have all been critical, but I really doubt they were.
I haven’t seen anyone mention this yet, but it appears that the Snub is quickly becoming the weapon of choice.