Frankenmauser, it's no tougher for me to reload for my 220 than it is for my 260. Why would you say it's tougher?
1. Brass flow.
2. Case life.
3. Case head dimensions.
Brass flow -
It's a pain. Even with moderate loads, I only got two, maybe three, loads out of most cases before neck turning was necessary. Not optional -
mandatory.
Case life -
Some brands lasted a little longer than others, but 4-6 loads was about all the average case could take before it required annealing. ....Which is also a pain on the Swift, so I stopped trying.
-- Both of the above could have been dependent upon variables that were unique to my barrel. Regardless, that was my .220 Swift experience.
Case head dimensions......
This was actually the biggest irritations for me.
I had (still have)
at least FIVE shell holders for .220 Swift. In theory, you should be able to use just about any .30-06 shell holder. But, no.
Every case manufacturer cut their extractor grooves differently, used different rim thicknesses, and had quite a bit of variance in rim diameter. Since all of the manufacturers cut their shell holders a little differently, as well, this creates a situation where you never know which shell holder will work with what brass.
You might have to use an RCBS #11 (.220 Swift) for one lot of Norma brass, but a Hornady #1 (.30-06) for another lot of Norma brass. If you pull out some new Winchester brass, you might not be able to use the Hornady #1 or RCBS #11; so the RCBS #3 (.30-06) has to come out. But, wait... they won't ALL work in the RCBS #3. For some of the new Winchester cases, you have to use a Lee #2 (.30-06).
Oh, and you have some old stock Winchester-Western or Remington cases? Well, it's time to take a chill pill, get out an adult beverage to sip, and put on some relaxing music. ....Because you'll probably be needing the Lee #2, RCBS #11, Hornady #1, and Hornady #45 (.45 Auto / .45 Win Mag). But still keep that RCBS #3 handy. You may need it....
In one box of Norma brass that I loaded, I found three cases that wouldn't fit ANY of my .30-06-sized (including .45 Auto-specific) or .220 Swift-specific shell holders. I had to chuck the cases in a drill and file down the rims!