I would like to know what criteria you're using to determine that a 257 is a 200lbs deer cartridge? Is it ft/lbs?
Just for fun here are some numbers.
30-06 165gr @ 2750 fps
FPS ft/lbs
0 Infinity 2750 2771 64.82 0.000 0.0 NaN 849
25 0.2 -3 2691 2652 63.42 0.028 0.1 1 795
50 1.6 -12 2632 2538 62.04 0.056 0.2 2 745
75 2.6 -13 2574 2427 60.68 0.085 0.5 2 697
100 3.4 -13 2517 2321 59.33 0.114 0.9 3 651
125 3.8 -11 2461 2219 58.01 0.144 1.4 4 609
150 3.8 -10 2405 2120 56.70 0.175 2.0 5 568
175 3.4 -8 2351 2025 55.41 0.207 2.8 6 531
200 2.7 -5 2297 1933 54.14 0.239 3.6 7 495
225 1.6 -3 2244 1845 52.89 0.272 4.7 8 461
250 0.0 0 2191 1759 51.65 0.306 5.8 9 430
275 -2.0 3 2139 1677 50.43 0.340 7.1 10 400
300 -4.5 6 2088 1597 49.22 0.376 8.6 11 372
325 -7.5 9 2037 1521 48.03 0.412 10.2 12 345
350 -11.1 12 1988 1447 46.85 0.450 11.9 13 321
375 -15.1 15 1938 1377 45.69 0.488 13.9 14 297
400 -19.8 19 1890 1309 44.55 0.527 16.0 15 276
425 -25.1 23 1842 1244 43.43 0.567 18.2 16 255
450 -31.0 26 1796 1181 42.33 0.609 20.7 18 236
475 -37.5 30 1750 1122 41.25 0.651 23.3 19 219
500 -44.8 34 1705 1065 40.19 0.694 26.2 20 202
I dont think anyone here would say that the 30-06 with a 165gr won't kill moose even under less than "ideal" conditions.
7mm Rem Mag 160gr @ 2850 fps
FPS ft/lbs
0 -1.5 2850 2886 65.14 0.000 0.0 NaN 889
25 0.1 -1 2791 2767 63.79 0.027 0.1 1 835
50 1.3 -10 2732 2652 62.45 0.054 0.2 2 783
75 2.3 -12 2674 2541 61.13 0.082 0.5 2 735
100 3.0 -12 2618 2434 59.83 0.110 0.8 3 689
125 3.4 -10 2561 2331 58.55 0.139 1.3 4 645
150 3.4 -9 2506 2231 57.28 0.168 1.9 5 604
175 3.1 -7 2451 2135 56.03 0.199 2.6 6 566
200 2.5 -5 2398 2042 54.80 0.230 3.4 6 529
225 1.4 -2 2344 1953 53.59 0.261 4.3 7 495
250 0.0 0 2292 1866 52.39 0.294 5.4 8 462
275 -1.9 3 2240 1783 51.21 0.327 6.6 9 432
300 -4.1 5 2189 1703 50.04 0.361 7.9 10 403
325 -6.9 8 2139 1625 48.88 0.395 9.4 11 376
350 -10.1 11 2089 1550 47.74 0.431 11.0 12 350
375 -13.8 14 2039 1477 46.61 0.467 12.8 13 326
400 -18.0 17 1991 1408 45.50 0.505 14.7 14 303
425 -22.8 21 1943 1341 44.40 0.543 16.8 15 282
450 -28.2 24 1895 1276 43.32 0.582 19.0 16 261
475 -34.2 27 1849 1215 42.26 0.622 21.4 17 243
500 -40.8 31 1803 1155 41.22 0.663 24.0 18 225
Again, the 7mm RM is a very popular cartridge and has killed tons of moose under less than "ideal" conditions.
257 Weatherby 100gr tsx @ 3650 fps
FPS ft/lbs
0 -1.5 3650 2958 52.14 0.000 0.0 NaN 729
25 -0.5 7 3568 2826 50.97 0.021 0.0 1 681
50 0.4 -3 3487 2699 49.81 0.042 0.2 1 636
75 1.0 -5 3407 2578 48.68 0.064 0.4 2 593
100 1.5 -6 3329 2461 47.56 0.086 0.7 3 554
125 1.8 -6 3253 2349 46.47 0.109 1.1 3 516
150 1.9 -5 3178 2242 45.39 0.132 1.6 4 481
175 1.8 -4 3104 2139 44.34 0.156 2.2 5 448
200 1.4 -3 3031 2039 43.30 0.181 2.9 5 418
225 0.8 -1 2959 1944 42.27 0.206 3.6 6 389
250 0.0 0 2889 1853 41.27 0.231 4.5 7 362
275 -1.1 2 2819 1765 40.27 0.258 5.6 8 336
300 -2.5 3 2751 1680 39.30 0.285 6.7 9 312
325 -4.1 5 2684 1599 38.34 0.312 7.9 9 290
350 -6.1 7 2618 1521 37.39 0.341 9.3 10 269
375 -8.4 9 2552 1447 36.46 0.370 10.8 11 249
400 -11.0 10 2488 1375 35.55 0.399 12.4 12 231
425 -14.0 13 2425 1306 34.65 0.430 14.2 13 214
450 -17.3 15 2363 1240 33.76 0.461 16.1 14 198
475 -21.0 17 2302 1177 32.89 0.493 18.1 15 183
500 -25.2 19 2242 1116 32.03 0.526 20.3 16 169
At the muzzle the ft/lbs are as follows
257 wby 2958ft/lbs
7mm RM 2886ft/lbs
30-06 2771ft/lbs
@200 yards
257 wby 2039ft/lbs
7mm RM 2042ft/lbs
30-06 1933ft/lbs
If we agree that 1500ft/lbs is needed to cleanly kill elk/moose then all 3 cartridges can do that out to 350 yards. Impact velocity is however, rather different.
@350 yards impact fps are as follows
257 wby 2618fps
7mm RM 2089fps
30-06 1988fps
Will a moose know the difference of a .5, .55 or .6 diameter bullet going though it? Don't think so. Will an impact of 2600fps be more violent than one at 2000fps? In my experience, yes.
So again, please explain to me how a 257 wby is a 200lbs deer rifle and the other two are elk/moose guns. If the recent trend in ultra mags et. al. is any indication 3000ft/lbs ME isn't enough anyways to kill moose. We should all be using guns with 4000ft/lbs ME minimum, which includes the big 338's and the new hot 375 ruger. The 375 H&H is now also retired because the 375 ruger is much better.
