I can appreciate that a low wall should just be what it is, and that there are different locking systems. Lever rifles are an example of relatively small barrel shanks mated up to the 30-30 head size, and others just a little bigger than the low wall running the big 45 and 50 black powder cartridges.

I believe its absolute silliness to do an inappropriate build today, but if the 38-56 low wall is a genuine Winchester, what exactly did they do wrong back at that time? This rifle did not seem intended for high volume shooting, could it have been sold knowing a durability trade off for weight savings. There are many modern examples of guns that get rattled to bits by full power loads, but the manufacturer knows the minuscule round count thats ever likely to go through the arm.