i'd say full-length neck size for sure. i've handloaded for 30-30, 30-06 and 280 rem handis. straight neck-sizing is too risky for hunting loads. at the range? no big deal. you might try semi-full-length sizing right to the joint between neck and top of shoulder, and check for ejection of cases with full hunting loads.
in handis, in my limited experience, trimming brass to factory specs is critical. on some chambers, IIRC, there is little room for brass growth. :wink:
but what do i know? in a handi, you typically are not loading screaming hot anyhow, so brass life probably isn't affected as much with full-length sizing.
again, YMMV. :eek: