I have to agree with Skeeter on the energy figure. Here is an extention of the chart posted at the Ultimate web site. I had to adjust the temp and altitude to get a close match since their numbers did not work in my ballistic program. Mine doesn't do air density.

Name: 45 Cal, Fury, 275 grn
Ballistic Coeff: 0.300
Bullet Weight: 275
Velocity: 2300
Target Distance: 200
Scope Height: 1.500
Temperature: 51
Altitude: 500
Ballistic Data
~~~~~~~~~~~~~~~
Range Elevation Velocity Energy ETA Drop Max Y 10mph Wind Deflect
0 yds -1.50 in 2300 fps 3230 fpe 0.000 sec 0.00 in -1.50 in 0.00 in
25 yds 0.42 in 2232 fps 3041 fpe 0.033 sec 0.21 in -0.55 in 0.12 in
50 yds 1.90 in 2165 fps 2861 fpe 0.068 sec 0.86 in -0.38 in 0.41 in
75 yds 2.92 in 2099 fps 2689 fpe 0.103 sec 1.98 in -0.09 in 0.87 in
100 yds 3.46 in 2034 fps 2525 fpe 0.139 sec 3.58 in 0.34 in 1.49 in
125 yds 3.47 in 1970 fps 2369 fpe 0.176 sec 5.70 in 0.91 in 2.33 in
150 yds 2.95 in 1907 fps 2220 fpe 0.214 sec 8.35 in 1.63 in 3.31 in
175 yds 1.81 in 1846 fps 2080 fpe 0.254 sec 11.62 in 2.54 in 4.60 in
200 yds 0.00 in 1786 fps 1948 fpe 0.296 sec 15.57 in 3.66 in 6.18 in
225 yds -2.52 in 1728 fps 1823 fpe 0.339 sec 20.22 in 4.99 in 8.02 in
250 yds -5.77 in 1672 fps 1706 fpe 0.384 sec 25.60 in 6.55 in 10.12 in
275 yds -9.78 in 1616 fps 1595 fpe 0.429 sec 31.75 in 8.36 in 12.44 in
300 yds -14.57 in 1562 fps 1491 fpe 0.476 sec 38.67 in 10.43 in 14.98 in
325 yds -20.16 in 1510 fps 1392 fpe 0.525 sec 46.39 in 12.77 in 17.72 in
350 yds -26.81 in 1459 fps 1300 fpe 0.575 sec 55.18 in 15.47 in 20.87 in
375 yds -34.50 in 1411 fps 1216 fpe 0.627 sec 65.00 in 18.53 in 24.32 in
400 yds -43.36 in 1366 fps 1139 fpe 0.682 sec 75.99 in 21.98 in 28.14 in
425 yds -53.40 in 1322 fps 1067 fpe 0.738 sec 88.16 in 25.85 in 32.27 in
450 yds -64.62 in 1281 fps 1001 fpe 0.795 sec 101.52 in 30.14 in 36.67 in
475 yds -77.14 in 1241 fps 941 fpe 0.855 sec 116.17 in 34.89 in 41.36 in
500 yds -91.16 in 1205 fps 886 fpe 0.916 sec 132.33 in 40.17 in 46.42 in

As you can see the numbers on this chart accually have a bit more energy than the ones on the website at 400 yards (the max they go to despite the 500 yard claims). At 500 it is only 886 fpe and has dropped another 4 feet from 400 yards. BTW the 7" point blank range of this load is only 233 yards. That is easily matched by a 150gr load behind a 200gr Shockwave launched at around 2350 fps from many "lesser" muzzleloaders. The 300SST launched at the same speed (2300) and same conditions has 100 fp less energyand 14" more drop than the 275 at 500 yards.

Please don't take this as jumping on anyone, just pointing out some holes in the marketing hype. It doesn't matter what kind of gun you use to launch a bullet, once it leaves the muzzle it is the weight, BC and velocity that determine the trjectory and energy on the other end. While these figures show a load that would probably be fine for whitetails at 500 yards energy wise, I still think a drop of over 7 feet is a lot to compensate for even in perfect conditions. The vast majority of shooters are probably not cappable of that kind of shooting, even at the range.