I dont believe bull barrels are neccessarily more accurate, they have a thicker walled barrel which reduces warping from heating of the barrel after constant shooting/plinking. I guess then they would be a little more accurate after you shot the piss out of you rifle. They sure do look cool too.
The .920" bull barrels are pretty much a necessity for me shooting silhouette. It's the weight of it shooting standing with no sling. Helps hold the rifle more stable. And yes----they look cool, and most HB's are a match chamber--with that little edge in accuracy.
bull barrels dissipate heat much better than standard.metal expands as it gets hot opening up the rifling slightly effecting accuracy.so you should be able to shoot more rounds with the same groups.bull barrels balance better as well just a pain to carry all day.