Yeah I guess the idea is I'm talking about many cartridges your talking about a few cartridges.i understand what your saying especially if 375h&h was in a semi auto.lol. That taper is for helping smooth feed where it's needed

Just like they say 7.62x39 is more reliable cause if case taper we can see than 5.56 but many of use have never had a jam with and AR or 9mm .just look at at 9mm it tapers all the way.


But we are way off topic

If we vast majority of people designed cartridges tomorrow we would start with 30° shoulders and no belt no doubt.everything i stated would be a fact.imo.

Now I'll never get rid of what I got for a new cartridge but the new cartridges are what i stated above.

Your one of two on here I'm extremely surprised would disagree .
The harder shoulder makes for more uniform powder burn along with harder shoulder angle preventing less brass flow .more brass life . slightly

I don't know not trying to argue but seems all the cartridge designers and gurus are going this way for these reasons ?