The 29/629 guns are known to loosen up if fed with a long term diet of full house loads. We've got one in the family and my mother really doesn't feed it a lot of full speed stuff. It's her's afterall.
I know what happens when you take after a smith with high pressure loads for thousands of rounds; I did it to a 586 357 mag. It grew to 12 thou. cyllinder gap from about 4 thou.
Could you please expand on your definition of a full house load? I hear it all the time but I would like to know some pressure specifications for what is termed an unsuitable load for a 629? Thanks for any insight.