You may not need to size them. I have pan lubed a lot of .45-70 bullets with good success.
If you want a lube-sizer, go ahead. The only reason you might need a heater is if you intend to use some of the very hard lubes. Most of my lubricating has been done with softer lubes, such as Alox-beeswax.
If you want a lube-sizer, go ahead. The only reason you might need a heater is if you intend to use some of the very hard lubes. Most of my lubricating has been done with softer lubes, such as Alox-beeswax.