OP, it will all depend on your rifle.
If it's a bolt action, you can likely get away with just neck sizing or maybe partial case resizing.
It it's a semi auto, such as an SKS, you may have to full length resize to get them to chamber properly.
I reloaded a lot of steel cases for a while, mostly out of curiosity.
The steel used to make them is quite soft, but it hardens very quickly. On the plus side, it doesn't seem to stretch as much as brass amalgam cases.
The steel used for cartridge cases is a low carbon type, which helps to keep it malleable. It's relatively easy to anneal, around 500F.
I started reloading steel cases for the 7.62x54R. These were commercial cases out of Europe, with a grey lacquer. They have Berdan style priming.
IMHO, I can see steel cases being used for commercial ammunition in our future. It's cheaper and from what I've read, easier to produce. It's biggest problem is rust, therefore it needs to be coated.
I reloaded some of those cases half a dozen times. The started to get cracked necks, before they started stretching.
There are some pros and cons for steel cases. Price is of course quite big.
Then, there is a good chance plastic cases will be developed. Lots of issues there to overcome.