30 yards is fine. 40 yards is usually fine. 50 is pushing it. I won't shoot at anything much over 30 personally, but guys who think they can out to 40 is fine with me.

I killed my bird this year at 15 yrds and my bird last year at 7 yrds. With a buddy last week he killed his at 25 yrds.

50 is pushing it. Anything 40 and less most of the time is a good clean kill.