I have shot some of those 'chilled shot' enclosed in burgundy colored paper tube and they did seem quite stiff to the shoulder. Why bother when you can get Fiocchi papers for about half that price. At least that's what I paid for them three months ago at local Gander Mountain. I use those 1oz and 1&1/8oz 1100fps loads in my sub 6lb Remi 31.
Buy few of them white boxes just to have them. Don't get me wrong the Winchester repros have higher quality case then those Fiocchis, but I would still choose those mid-western black shells for shootin' swamp bunnies, squirrels, ......and such.
If I had to pay top buck I would go with Federal 'Gold Medal' papers every time.