Like Steveno above hinted, the general availability in "Mom and Pop" convienence stores is regional.
In the Deep South and Southeast USA, it's always been rather popular. A bit better than the .30/30 inside of 150yds, its really popular where the game is a bit bigger than deer. (hogs and bear).
When my older brother was stationed in Maine in the mid '80's, he (we) discovered that in upstate Maine around the Limestone and Caribou area around Lorcin AFB that it was one of the prefered cartridges for bear and moose by the locals.
It, like the .30/30 got a new lease on life with the introduction of the LeverEvolution cartridges by Hornady.
Don't see it disappearing anytime soon.................