Another Question towards ML purchase

I just did a "barrel length" search and didn't see anything that helped. I did read somewhere that a 150 gr charge will not burn completly out of a 28 or shorter barrel. Not sure where. Got the Bass pro catalog and noticed 24" on the wolf 26-28" on most and 29" on one of the CVA's. Is the an accuracy advantage to length regardless of brand?

I am aware that after I purchace one it will take plenty of time to find the right load combo for that paticular gun.

Just curious if anyone has noticed a trend leaning to longer better or longer no differance.