In order to attempt a �real world� comparison, the following field type loads(magnum class rounds) that I ran through my ballistics program were taken from the 12th edition of the Speer manual (because Speer uses real instead of pressure guns). A 200 yard zero was used. Just as in the hypothetical model the differences are for the most part very miniscule.
What do You folks think ?

Good Shooting,
HBB

1. range 2. velocity 3. trajectory 4. actual drop 5. time of flight 6.muzzle energy
7. wind drift-10mph crosswind

1. 220 Swift 52 grain bthp-match @ 3844 fps (.253 BC)(pg. 159) Test Rifle: Ruger 77-V w/26 in. bbl.
500 2151 -29.99 45.31 0.53 534 23.39

2. 240 Wby Mag. 105 grain Spitzer @ 3206 fps ( .443 BC) (page 179) Test Rifle: Wby Mk V w/ 24in. bbl
500 2178 -34.4 56.41 0.57 1106 17.67

2. 257 Wby Mag. 120 grain BTSP @ 3199 fps(.435 BC) (page 195) Test Rifle: Wby Mk V w/24 in bbl
500 2156 -34.84 56.97 0.58 1239 18.1

3. 264 Win. Mag. 140 grain spitzer @ 3130 fps (.496 BC) (page 204) Test Rifle: 700Rem w/24 in barrel
500 2217 -34.72 57.47 0.57 1528 16

4. 270Wby. Mag. 150 grain btsp @ 3249 fps ( .496 BC) ( page 211) Test Rifle: Wby Mk V w/ 26in bbl
500 2311 -31.94 53.23 0.55 1779 15.23

5. 7MM Wby. Mag. 160 grain btsp @ 3082 fps (.556 BC) (page 235) Test Rifle: Wby. Mk V w/24 in barrel.
500 2268 -36.04 57.72 0.57 1828 14.35


6. 300 Win. Mag. 180 grain btsp @3059 fps (.540 BC) (page 313) Test Rifle: Ruger 77 Mk II w/ 24 in bbl.
500 2227 -35.47 59.01 0.58 1982 14.98



7. .338 Win Mag 225 grain btsp @ 2981 fps (.484 BC) (page 350) Test Rifle: 70 Win. w/24 in bbl
500 2077 -39.1 63.98 0.61 2155 17.58

I think you're full of poo-poo.

How come your muzzle energies are so small?

The ME is, according to the computer, that which remains at 500 yards.

HBB

Why not call it remaining energy then? Muzzle energy is the energy at the muzzle.

All this data means nothing unless YOUR rifle is getting the same thing. You won't know this unless you Chrono each load and rifle.This data is only good for that rifle but can give you some idea of what you MIGHT be getting.