25 is faster.
243 is used on oily surfaces that can't be cleaned.
71, the difference between the lowest and highest numbers.
To convert 243 Kelvin to degrees Celsius, subtract 273.15 from 243. Kelvin and Celsius have a difference of 273.15 units between their scales, so 243K - 273.15 = -30.15°C.
The primary difference is the engines. The -203 uses General Electric CF6-80E1A3 engines and the -243 uses Rolls Royce Trent 772B-60 engines.
852
There is little ballistic difference between the two. The .243 will drop about one inch more at 300yards (between 10 and 11 inches) than the 25-06. However the .243 will have a 10 grain advantage in bullet weight. If you are hunting anything bigger than a prairie dog you might want to go with the .243. Otherwise for general varmiting and target shooting the 25-06 will give you an extremely tiny edge.
151 MI/ 243 Km
.241, .242, .243
243 kilometres (or 150.99 miles)
243
How about: 243 = 243.0
486 - 243 = 243