Thanks for the input men, and the discussion following. I think the chest fits fine, it's a relaxed fit that I have no problem with and I don't tend to think it looks billowy. It was an ebay thrift that cost me fairly little, Hackett linen and cotton I believe. Most likely I wont wear it, the shoulders present an obstacle in that there will be too much alteration needed together with sleeves & body.
I purchased 2 SC's on the bay for quite little. This one and one SR pane/check in wool, they were both advertised as 42R but the SR one fits very much better in all aspects mentioned as flawed in the fit I posted. I've learned a lesson though, keep to your exact measurements as I did on the SR rather than your "size" -- what I relied on for the Hackett. Progress, gentlemen.
I don't understand why people buy jackets/suits over the internet because you can't try the stuff on. I go to stores and try jackets on and even though they're the same size they all fit differently. Some of them fit better than others. I only buy them if they're close and I think my tailor can alter them.