I have owned several 24" factory tapered Encore barrels and they are perfect in weight and length.
I once bought a 26" heavy barrel is 375 JDJ, but soon discovered it was way too heavy and awkward too carry. I sold it and never considered another for purchase.
If a 26" heavy barrel is dedicated for the bench rest, then I can see where a extra weight and heat transfer is useful. The 28" heavy fluted barrel offers even more surface area for heat transfer if dedicated for the bench.
I do own the 26" 209x50 muzzleloader barrel, but that's not the same as a 26" heavy rifle barrel.
yooper77