the Devil is in the details, poor blanket statement, LR. Not saying there are any flies on a 28 Nosler. Custom reamers for the 7 RM, 7 STWs, and 28 Nosler are in my toolbox. Reloading manuals are quite anemic on the 7 STW loading data, I got quite a bit more out of the three that I have had, two 7 Rem mag SS fluted set back and chambered with the 7 STW reamer, (2)25 1/2" and one Pac Nor 3 Groove 27". Pac Nor shoots the 140 C/T at 3650 into bug holes with high high-powered scope, Rem setbacks are shooting the 140 C/T at 3550, and Winchester brass is the key. 120 TTSX with IMR 7828 and R#22 are shooting groups the size of pencil erasers at 3800.
With no brass available for the 7 STW, looks like the 28 Nosler with AGD brass wins the show. No flies on a 7 Practical and 7 Mashburn either, other than a lot of work, a tad slower than the 28 Nosler, but brass will be available for the 7 Practical and 7 Mashburn for your lifetime. The 7 Practical and 7 Mashburn accuracy nodes with the 162-168 are at 3200-3250 with 3350 being the top end, and you can do a LOT with the 162-168 at 3200-3250.
I have read that there are some mismatches in dies/reamers for the 28 Nosler, would be good to hear more on this.