Re: .300 Win Mag effective range
Look in the back of the Hornaday 47th reloading manual (should have at any gun store) and they have a couple of real helpful tables. The first is the average and maximum weights of common game animals. The second table covers the energy that different weight bullets of different caliber have at different ranges. This table basically tells you the maximum weight of an animal that you can take for a certain caliber and weight of bullet for a certain range. Extremely helpful. For example, quoting from memory (I think) a 100gr .243 bullet still has enough energy to take a 100 lb animal at 300 (or was it 400) yrds. Referring to the table on animal weight, you see that an antelope buck weighs 80 lbs. Thus you're ok to take one out to 300 yrds (again these number may not be exactly what the table says since it's been a few years since I hunted antelope with a .243). If you're gonna take animals at range, you have to remember that there's a big difference in shooting an animal with a perfect side view vs shooting an animal with a quartering view (either front or rear). It takes a lot more rifle to penetrate through say a rear quartering shot then a perfect side view shot. I just try to use a bit more then what I think is enough rifle for the job. Hope this helps.