Can it handle high-pressure loads?

Yes it will handle heavy loads in fact many reloading manuals list some 45LC loads as being only for the Ruger Blackhawk and the TC

It's a "Bisley" built on the New Model Blachawk frame (not quite as robust as the Super Blackhawk but strong enough for heavy loads) and will handle heavy loads. If you feed it a steady diet of heavy loads you may want to get a Belt Mountain Enterprises c

Ruger's, are some of the heaviest built revolvers in the world. They will shoot any factory load.

David, this will shoot heavy loads without issue. Yes it is a BlackHawk, This is a "stout" pistol built to handle "stout" loads.