Just about any caliber can be forced to work, just some are a lot easier to shoot, and some are a lot easier to pay for.
My respect for the 270 stops at 400 yards, but ONLY because of the immature selection of projectiles. I love the round and have a few rifles chambered for it in Winchester Classic design.
IF the 6.5-06 or 280 had been first on the scene, it is doubtful the 25-06 and 270 would even exist at the level of popularity they currently have.
The 260 with a 24" barrel (min) will do the trick, it is what my brother shoots and it is a sweetheart about recoil.
6.5x47, 6.5 creedmoor are a little shy on horsepower FOR ME but will work, those cases necked down to 6mm would slightly stretch the yardage markers- it would seem to reason.
The 243 or 6mm remmy with an aftermarket barrel with 1-8/9 twist will REALLY shine with the 100+gr. bullet weights at the cost of barrel life- about the time you get really proficient a new barrel is in order; the 6mm XC - Dasher - Norma BR are all excellent choices ( in that respective order) but start-up costs are tough.
6.5x55 has really surprised me ,as I started using the caliber for deer, it is very close the the 260- possibly a little better because of case capacity - but it is a Ford vs. Chevy IMHO.
I had a 7mm SAUM built and couldn't be happier with the performance, but had excellent reference loads from 6mmBR.com and was after chrono spread numbers to eliminate that major variable that shows up horribly bad on target at 1000 yards. This rifle only shoots known marked distances, 28.5" barrel kinda limits its portability........
For TACTICAL I believe I'd go with the 260 or 6.5x55, for target ( with a bench! ) I already made my choice and am happy with the results.