When I bought my first .44 which was a 629-1 in early 2000 the gunsmith gave me one warning. He said the the 629 and 29 of that time frame were designed for a 240 gr bullet. His warning was do not shoot a 300 gr bullet as the life of the gun would be shortened.

I've stuck to that advice and have never had a problem with either the 629-1 or 29-2 that I own. To be honest I shoot either a .44 Spl at 950 fps or .44 mag at about 1100 fps using 250 gr LSWC bullets.