I believe you and your friend. I feel that there are failures in anything mechanical. We will see failure from all sizes of bullets at some time. The value I see from smaller cartridges, is that you can see your impact easier and if you have a failure or a miss your ability to get back on target and send an additional shot. Where I hunt we preach for people to keep shooting until your animal is on the ground not moving or out of sight. I can do it with a 300WM but I'm way better with a 6.5CM and stupid fast with a 243.Not directed at you, just generally speaking. It got comical.
Jay