RE: PRB ballistic coefficient?
B.C. OF ROUNDBALL[/b]
Here are some BC's that you can use in G1 table.
Caliber BC
.570 .066
.535 .062
.530 .061
.495 .057
.490 .056
.457 .053
.454 .052
.451 .052
.445 .051
.440 .051
.433 .050
.375 .043
.350 .040
Here is a chart for a .530 ball at 1700 fps with a front sight height of .75 inch above bore centerline and with a 50 yard zero.
Range Elevation Velocity
0 yds -0.75 in 1700 fps
25 yds 0.15 in 1448 fps
50 yds 0.00 in 1242 fps
75 yds -1.56 in 1093 fps
100 yds -4.91 in 997 fps
125 yds -10.37 in 928 fps
150 yds -18.19 in 872 fps
175 yds -28.70 in 824 fps
200 yds -42.10 in 781 fps
225 yds -58.88 in 742 fps
250 yds -79.26 in 705 fps
275 yds -103.57 in 671 fps
300 yds -132.53 in 639 fps
perhaps this will help...