A sporter barrel is intended for a single shot or maybe 2. They are fussy regarding barrel harmonics and therefore the exact load. This might also be temperature sensitive. If you want a barrel which will shoot a wider range of loads with less sensitivity and also tolerate a longer string of shots better, then you will want a high quality varmint barrel. A 26" barrel will also deliver more speed than a 22, assuming you are reloading. Whether the difference in speed make a difference depends on the range. An extra 100 - 150fps will start making a difference beyond 400 yards. Remember, not all varmint barrels are equal. An ER Shaw is not a Shilen, for example, even though the cost difference is not all that great.
I will say that if you think you want to shoot 55gr bullets, you should run the ballistics first. Wind drift on those low BC bullets is pretty terrible at 400 yards. It seems that one can get 22-250 8 twist barrels (Shilen, saw one on midway today in stock) and those should shoot 80 gr bergers good. An 80gr berger is a whole different story at 400 yards compared to a 55gr Vmax. Run the numbers yourself with a 10pmh crosswind component.