I get the impression there are many barrels made for the 10-22, are there many target quality barrels commonly made for the 77-22.

Not that there seems much wrong with the original one (from the first year of manafacture), but I gotta try to keep ahead of all these Brno's CZ's and Anchutz's sneeking up on me.

Green Mountain sells them for the 77/22.
http://www.gmriflebarrel.com/catalog.aspx?catid=RugerTargetBarrels

I can confirm the Green Mtn. barrels are excellent. There might be better, these are excellent. Your groupings might well drop to half the size vs the factory barrel.

Thanks fellers, I'll look into that.
But how can you help someone who last Sunday shot better groups at 90 metres than at 60 m.
Maybe my bullets went to sleep after 60 m.