Does that on those heavier bows a bit more I am thinking, especially if the arrow is heavy. Way more stress on the nock that way.
I made a heavy "buffalo arrow" to play with using a older Beeman Hunter shaft and some lead solder as an insert. Around 1200 grains, using an 83# hybrid longbow. I had to change to another style nock cause the Beeman nocks wouldn't handle it. Broke several. First one I wasn't wearing an arm guard and ended up with a welt the size of an egg and I still have a scar there. Owie ! !
ChuckC