I use a Lee 1oz slug mould, Red Dot or Herco and used Magtech shells/cases/hulls.
It's been a long time since I loaded any but 18grains of Red Dot rings a bell! They cycled perfectly in my semi-auto and were quite accurate at up to 50 metres (with just a nipple for a sight ).
The felt wads came from Kranks, they were £4 for 250 so that'll give you some idea how long ago it was

Good luck
Brian