I used RST 10's almost exclusively on woodcock this past season and they were great and hard hitting but only at close distances, either in the open or shooting through light cover.
As mentioned, they don't carry much energy beyond 20 yards or so and I ended up wounding more birds than I would have in the past with larger shot (I think). This was not a huge problem since I hunt with dogs and all wounded birds were quickly retrieved but I was troubled by this increase in wounded birds. Next year I will either go back to 8's or severely limit my shooting to only close in birds with RST 10's.
