I’m gonna maybe be a little against the grain here, and definitely ramble. Just some thoughts, so don’t take this as advice or gospel.
What makes a cartridge relevant? What makes it irrelevant? Case design has not made any significant advances in many years for the chamberings in common use today, we’re just continuing to tweak with them and all the permutations of parent cases multiply.
Obviously I’m leaving out the space age stuff
@THEIS alludes to, but that’s not in common use yet so that’s all I have to say about that.
What matters, to me, are hits. Hits where I want them, not line cutters or skint edges. I think we can all agree on that one constant, we want to be able to put the bullet where WE want it, everything else is just having fun.
If relevancy is determined by how fast it gets there and how badly it kicks the wind’s ass, then we’re in a whole other conversation. If it’s determined by barrel life, or a balance between speed and barrel life, that’s been an ongoing thing for many years, and in a lot of cases we’re just rehashing what’s already been done by wildcatters for years and making our own marks on them.
The important thing to remember is something Frank touched on, maximizing the case. Not just the capacity, or any singular thing. It’s a concert of things. Neck length, shoulder angle, body taper, web thickness, flash hole thickness, primer pocket size, and efficiency of powder column combustion. Not to mention tailoring the reamer print for specific bullets, but I’m not even gonna go down that rabbit hole or
@Tucker301 will ban me for talking too much, or inciting a riot, or something like that ?
Now, maximizing the cases potential can mean different things to different people, for different uses. If you want an elk or bear payload delivery device that’s gonna buck winds across a canyon in Oregon or Montana, etc, and give a big bull the ole donkey stomp, it’s an entirely different thing. Same goes with varmint shooting, predator hunting, etc etc ad nauseum.
If you want a match rifle that beats the wind but also needs to stay cool enough through the shot string to avoid the potential of walking POI, which can happen even with the heaviest barrel when a shit ton of powder is being burned, then you pick a chambering maximized for that use, including reamer details and considerations for magazine length feeding and keeping the base of the bearing surface in front of the neck/shoulder junction. Determine how often you can afford to replace barrels, and most importantly, one that gives you the warm and fuzzies. Confidence is everything. It’s smart to look at what’s winning 1k benchrest, they fire off a 10 shot string faster than most people can work a bolt and have developed great things, many of which are commonly talked about and used here.
I think the hardest thing to do is keep an open mind, and to learn what makes a chambering good, bad, great, marginal, or to realize that most any chambering can be optimized and made to shoot well. Some just tune better than others. Some will shoot better than others, and are empirically proven to do so.
Sorry for the ramble, cartridge design and application have been a major interest for me for over 20 years.
TL;DR - No, I don’t think it’s irrelevant.