Supepose I've taken 100+ deer with an 06 and all with spitzer bullets. Never been too close for a spitzer to open up. Taken a few at 10 yards or less. At that range, angles are wierd, often straight down, head on, or you name it. Spitzer opens just fine. Always thought a 180 RN was slower to open.
Nope, just the opposite...
As we all know, close ranges mean higher velocities. So either, your bullets where designed for the velocities or your shots impacted bones enhancing there expansion. There is also a variable that back in the day, smaller calibers used lighter bullets and bigger ones used heavier. The predicesor to the 06, the 1903, it was an improvement over the 30 GOVT/30-40/30US which used a 220g bullet. The 06 came out with a 180 and the 220G bullet...
See its simple, we all know a streamlined bullet is prefered for longer ranges, right? Well having said that, it makes sense that a RN would be the opposite, or better for close ranges. One would be correct in assuming that its meant for close range. Truth be told, it has little difference in tredjectory out to 300 yards. Just as a stream lined bullet slips thru the air it slips thru the flesh. Where a RN barges thru the air with much turbulance it barges thru flesh as it does it opens faster.
Why many spitzers fail in the 308 and 30-06 is also simple... there are SO many 30 calibers how can you build a cup and core bullet to work ideally in all? Answer, simply you cannot. So if you happened to get a bullet 180g bullet that's designed to perfectly expand in a 300Mag going say 3200fps at 50 yards. Use same bullet in a 308 that cannot attain 2600fps and its quite likely, if not bones are hit, get little expansion.
But the 180RN was designed for the 308/30-06 velocity range, and the Magnums are for long range. Magnums are not generally offered in a RN design. Again why? Because the public wants a big magnum for reaching out to long ranges NOT drilling the shoulders of a 300# Maine swamp buck at hair cinging ranges.
Now nothing against a spitzer, today we can find them taylored to the velocities we will see impacting our game. This is especially true for the hand loader. Personally I have always liked the RN but my hunting is close range, where I to be in areas where over 300 yards where more the norm, I would have as stream lined a bullet that retains as much energy and velocity as was possible.
Simply put, heavy bullets got a bad rap in the 308 and 30-06 because the heavy (180+) where designed for bigger calibers.
CW