IK, apparently you think that just because rifles are not commonly used for self defense purposes at greater than normal pistol distances that rifles would not be useful. That would be in error.
DC Snipers were close distance.
They were further that most folks shoot pistols, out to 150 yards.
The other hunters who Vang murdered had rifles but were not prepared mentally to shoot at another human.
That does not mean that rifles would not have been very useful for their defense, does it?
Clock tower was defeated by rushing the tower.
Yes, but under the assault of 10s of shooters on the ground using rifles that kept Whitman occupied (see
http://www.nationmaster.com/encyclopedia/Charles-Whitman ). Most of his targets were within 400 yards, certainly within the range of rifle caliber carbines, although his longest shot was a bit over 700 yards.
Malls and schools are CQB distances etc and etc.....
Folks shot in malls are often shot at distances greater than most folks use pistols. Some people shot at Columbine were shot in excess of 50 yards. As noted, Whitman's shots were out to 700+ yards.
Nobody is going to be walking around the mall with a rifle.
Ah, but managers or employees in stores at the mall could easily have long guns. Besides, bad guys manage to walk around the malls with rifles. However, that isn't the point, is it? Given the length of shooting events, such as at the Tacoma Mall, a person would have time to retreive a rifle from the parking lot.
In most cases where someone is more than 50M away, you do not need a rifle as you can evade.
Well gee, in most cases, you can evade lots of threats, but that doesn't make it always prudent, does it? In fact, in most cases, you don't even need a gun, do you?
Even if you can evade, it may not be the most prudent option depending on the circumstances.
In the Hollywood bank shootout, the police were offensively shooting. They deliberately engaged the bad guys while being under armed. The average person on the street could have ran the other way and been just fine.
Protecting the public isn't offensively shooting.
Carbine defensive distances are not long distances.
Really? Just how far do carbines shoot? I regularly shoot mine to 400 yards, occasionally out to 600. Carbines will certainly work well out to the 300 requested in the OP.