Accuracy.......a relative term, at best!! But yes, HB 22 rimfires tend to stay more stable than their lighter counterparts. It's very rare to see a sporter weight barrel in a rimfire benchrest competition. My HB rifles include a 52A Winchester, 52C Winchester, 504 Match Remington, 40X Remington, and I have coming a Match 54 Anschutz. I have several "sporters" that have slightly stouter barrels than normal sporters usually have, and they all do quite well, but most cannot hang with the "big" dogs over the long haul. Then there are the sporters with light, whippy barrels. These tend to shoot "looser" than do the heavier barrelled rifles, although the odd one displays surprising accuracy. That's the interesting thing about firearms....you can get a surprise from a rifle that you may have thought was an unlikely candidate for the title of "Tackdriver" For a 22 to be truly accurate, it must have a match chamber. This means it will engrave the bullet when a cartridge is chambered. Some sporter rifles were made with match Chambers. I have three, a 541S & a 541T Remington, and a 504 sporter with a Lilja Barrel. These are very accurate, and have won matches from time to time. It all depends what you want your rifle for. If it is going to be carried a fair amount, an accurate sporter is obviously best. If you are shooting bench rest or from one location in a gopher field, then the heavy is an advantage. Another thing about that heavy barrel. It seems to stay more stable on the rest when you are shooting at the bench. Has to count for something as well. Regards, Eagleye.