I have an old chart published many years ago by Winchester for lead. It doesn't cover the ranges though you asked for, only going up to 1330 fps on the high end but down to 1135 on the low end. Here are the results for #4 lead @ 20, 40 & 60 yds.
MV = 1330-----20yd-V = 1010------40yd-V = 815-----60yd-V = 685
MV = 1235-----20yd-V = 955-------40yd-V = 780-----60yd-V = 660
MV = 1135-----20yd-V = 895-------40yd-V = 740-----60yd-V = 630
From these figures can be seen how quickly round pellets lose speed above the speed of sound. Here 195 fps difference at the muzzle results in a difference of only 55 fps by 60 yds. Steel being much less dense than lead with a lower sectional density will of course fare much worse than lead. To get sufficient velocity for adequate penetration for clean kills it is necessary to use much higher initial velocity or increased pellet sizes, or a combination of both, over the use of lead.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra