I've been playing with various 30-30 ackley variants for quite a few years in contenders, have owned a few different die sets for them.
If you want a neck die set, Redding does indeed make a 3 die set for the 30-30 ackley.....part # 84431....my set happens to be that set. I got that set quite a while ago with a barrel;
otherwise i probably would not have paid the price tag to get them. (Usually around $250-ish!)
The full length Lee set for the 30/30 ackley improved is around $40, the Hornady set is around $80.
Before i got the Redding set, i neck sized by backing my sizer die off around 1-1/2 turns to neck size formed cases, and not bump shoulders.
Also, you can use a .375win FL sizer die body to reduce body size on your 30/30 ackley fired cases...when loading 6.5x30-30ackley or .25x30-30ackley, i usually neck size only after forming,
and then bump body diameter as needed with my .375 win sizer.