Originally Posted by Buffalobob
Obviously a ballistic calculator will give you more accurate results but just for standing around talking, it a good rule to remember.
By the numbers under a theoretical hunting situation via JBM:
Temp: 35deg. Baro: 29.92 Hum: 70% Elev: 1000 (All numbers reflect my hunting situations this past year)
300WSM: Muzzle vel: 2800 (good avg. to use) 208 A-max @1000yds= 1550fps 1110.8 ft. lbs energy. 27.8MOA elevation
300RUM same bullet: 3200fps (popular speed on this sight) @1000yds= 1849fps 1578.7 ft. lbs. energy. 20.2 MOA elevation
300RUM 240SMK: 2925 (guesstimate, but doable looking at loading info) @1000yds= 1670fps 1485.8 ft. lbs of energy. 24.7MOA elevation
So according to these numbers, the RUM will by far be the better rounds for such large animals compared to the WSM.
Just for fun here are some 338 numbers: We'll use the the avg. speed for the RUM and EDGE which is right around 2820. Same scenario.
300SMK @1000yds= 1736fps 2008.2 ft. lbs. energy. 24.6 MOA elevation
The Lapua will net you about 2850fps but can get a little more depending on the barrel length.
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