Winchester SilverTips are decent for factory loads, although the quality was quite spotty in the last several lots that have made it north. I have purchased close to 500 rounds from the three local gun shops. While the SilverTips average 1250-1388 ft/s in my G29, I found 6 rounds with enough weight difference from the 'average' that I refused to fire them.
All other factory loaded 10mm that I have tried has proven anemic, and not worth the cost.
Regarding the Norma original rounds being 'too hot', the issue of pistol stress and parts breakage did not lie with the ammunition, the fault was very clearly attributable to Colt with the introduction of the Delta Elite in 10mm. Colt simply rechambered a pistol designed for the 18,000psi 45acp to fire the 10mm round operating at 37,500psi (designed to withstand 50,000psi). Little wonder why the 45 pistol could not withstand pressures over double those for which it was designed beyond 1,000 rounds.
I fire 190gn bullets in a Storm Lake 106mm barrel (tight fully supported chamber) in my G29 at 1,400ft/s on a regular basis in addition to the 135gn bullets operating at 1,800ft/s. Through many hundreds of rounds, I have noticed no ill effects.