Dear Guys,
I agree that the .30 carbine with soft points is very underrated. At 200 yards, it still has about the same foot pounds of energy as the 9mm pistol at the muzzle.
But, I think 200 yards is about the realistic limit. The poster asked about 300 yard shots, and I just can't see it. Sure, on a calm day at the range, shooting from a bench, at a nice big black bulls eye at 300 yards, you will achieve some hits. But, as far as shooting at live targets at 300 yards under stress, I don't believe it will be effective at all. To the contrary, I think it would be practically worthless.
When you have to assess a rifle by saying that you know it will MISS alot at a certain distance, and that you will make up for this by spraying, and that you know that even with a hit it will only cause a wound, then I personally believe that the analysis is way way out of bounds and that the rifle is a total failure at that given range..
What it would do at that distance is draw return fire, and an assailant with a .223 or .243 would have no problems whatsoever hitting you in short order, and he wouldn't have to spray rounds to do it.
Cost? In order to get a totally reliable M-1 carbine in VG+ condition these days, you are talking about a minimum of $800.
A far far better choice would be a Ruger Mini-14 in .223, which you can find used in excellent shape in the $600 range. It would be VASTLY superior to the M-1 at 300 yards (assuming you buy one that has the pre-fix number showing that it the improved model, i.e., the ones with the two wings that protect the front sight).
Just my thoughts.
Mannyrock