For crying out loud. Time to cut the crap!!
For those of you who keep saying that this is not a deer round, do your research and shut your mouths.
I consider the minimum terminal energy to take a deer to be 800ft/lbs.
The 7.62x39 with a 125gr bullet will do this out to 200yds and with a 150gr bullet will do this out to 300yds. When loaded into a quality rifle chambered for it, it will do this job repeatedly.
The .30-30 with a 150gr bullet can easily do it at 200 yds but not come close at 300, and, again, handily with a 170gr bullet at 200yds but no where close at 300. Let it go. Embrace the fact that this is a good round.
So, since I am mouthing off, let's compare apples to apples. From Bob Forker's Ammo and Ballistics Ed 3.
125gr bullet in 7.62x39mm
MV=2438fps, ME=1629 ft/lbs
100yds V=2069fps, E=1173 ft/lbs
200yds V=1756fps, E=845 ft/lbs
300yds V=1490fps, E=609ft/lbs
150gr bullet in 7.62x39mm
MV=2300fps, ME=1762 ft/lbs
100yds V=2052fps, E=1403 ft/lbs.
200yds V=1821fps, E=1105 ft/lbs
300yds V=1609fps, E=863ft/lbs
Now the .30-30, using the hottest load listed
125gr bullet
MV=2570fps, ME=1830 ft/lbs
100yds V=2090fps, E=1210 ft/lbs
200yds V=1660fps, E=770 ft/lbs
300yds V=1320fps, E=480ft/lbs
150gr bullet
MV=2480fps, ME=2049 ft/lbs
100yds V=2095, E=1462
200yds V=1747, E=1017
300yds V=1446, E=697
170gr bullet
MV=2200fps, ME=1830
100yds V=1900fps, E=1355ft/lbs
200yds V=1620fps, E=990
300yds V=1380fps, E=720
So we can see that with both loaded with a 125gr bullet, the .30-30 is only slightly faster out of the muzzle and has only 70ft/lbs more energy. Don't think the deer will feel the difference at 25 yds. At 100yds, the much more powerful .30-30 round is only 40fps faster and, what's this?? almost 200ft/lbs LESS energy. How can that be at only 100yds?? And at 200yds there is no comparison. The .30-30 isn't even in the same game being well under the established energy for a kill, while the 7.62x39mm is still above it.
Oh, but wait, no one uses the 125gr bullet in a .30-30, lets use the 150gr.
Okay, the .30-30 once again has the advantage in MV by almost 200fps, and ME by almost 300ft/lbs. Again I doubt that the deer will notice the difference at 25yds.
however, at 100yds thing change again...they are almost even with a bare 43fps and 59ft/lbs of energy going to the .30-30. Again, not sure that a deer will notice the difference.
Let's see what happens at 200 yds? The .30-30 is, can this be true?? SLOWER than the 7.62x39mm round by 74fps and is less powerful by 88ft/lbs. Again, in reality, I don't think the deer would notice the difference, but if the .30-30 is considered adequate for deer, and it is a proven deer getter, then anything more powerful should also be adequate.
I will admit, however, that this is getting to the upper end of the weight range for this round but the .30-30 still can't beat this performance even with a heavier 170gr bullet. The 7.62x39mm starts out faster but hits a little lighter at the muzzle however, 70 ft/lbs is not much harder. At 100yds the game is over. It is traveling faster and hitting harder all the way out to 300yds proving that this is an adequate deer round.
So, somebody, PLEASEtell me how this is an inadequate round for deer!!