Like many I use Winnie 40gr subs for my rabbit shooting and I absolutely love 'em.
However last time I bought some I tried the 42gr and I hate them! I heart lung shoot most of mine since I don't eat the front half anyway (dog does) and with the 40gr they just fell over and rarely twitched.
50 rabbits later and the 42gr just aren't as good, I've had runners and some which twitch for ages all despite perfect placement.
Now I can't get the 40gr so going to try either Eley, CCI (non-segmented) or SK as that's what me dealer has in stock.