The claim is watered down by lesser boats that call themselves unsinkable but come up short. Only the legend remains truly unsinkable. Cut a commercial Boston Whaler in half with a chainsaw (we have) and not only does it not sink, you can still drive it. Even fully swamped, under the worst, repeated abuse – intentional groundings, punctures by submerged objects and collisions in dense fog – this boat floats. On actual missions, Boston Whalers have returned their crews safely to shore with a three-foot hole in the bottom, a crushed bow, or even having been sliced completely in half.
The problem with 9mm is that even though it is a wonderful round and great for training, accuracy, and capacity. It is a double edged sword, the downside is that the round it’s a higher speed round and is more likely to penetrate through walls and obstacles. Versus .40 and .45 ACP are a much larger round, and are less likely to go through walls (lower FPS). The advantage is also they have GREAT stopping power (works great for Deer) The downside is that the recoil does affect as persons arm no matter how strong they are. They are just as accurate but have a lower capacity. Personally I carry .45ACP just because of the stopping power and that they sound very intimidating compared to a 9mm.