You don't need "the best", as a tool and die maker would.
I have dial calipers from Starrett and Brown & Sharpe, and they are dead on, after decades, but would cost dearly if bought new today. Mitutoyo makes top digital, but again, you don't need that, either.
Digital is nice, because you only need one caliper, to check cases and OAL vs any recipe.
I have been very happy with my iGauging IP54 digital. It is stainless steel with hardened jaws, and coverts from metric to inch on the fly. They are about $50 USD, but I got them on sale for almost half. I have some Hornady which were given to me, and they are nicer than those, in the sense of feel on the thumb wheel. I can walk the IP54 down 0.001 inch at the time. 0.0005" resolution, 0.001" repeatability, three readout formats to 0.0005" / 0.01mm / 1/128 inch