Hey gambit50, thanks for the response. You're right about the fisrt pic, I did noticed that. I have tried to go down and my delts pop out of the sleeve. Plus I don't have the chest to use a 44, but a 42 is too tight, since it measures 42.5". Problem is the shoulders, they are shifted foward, plus a bit of muscle and some large shoulders blades, expand the chest area of a 42 jacket and cause shoulder divots. That's why I'm asking if the chest can be shortened a little bit.
I looked for the what is the "acromion" and well, I will try to get a pic later of the size I used before (a 40) and the seam sits right there, at the acromion, and looks awful. I got a bespoke jacket and the measurement between the shoulder seams is 19" this one have 19.25" so it's not a huge difference. About the lenght, yes I think it's a bit too large but the regular, the button stance it's way high, and I don't like how it looks, plus jacket doesn't cover my butt. The jacket have 33" long, 32" would be perfect or 32.5" but I don't know if that can be fixed.
About the shirt, I understand, don't worry, I have this one of some I bought RTW, they weren't ironed yet nor washed. I just got the package that day and had to try them on. This have 19" across the shoulder seams and 45" chest. I can't go a size up, cause I use a 16" neck.
Shirt fit. (Click to show)
Well,you certainly have some musculature to you.Glad you are not another one of the liars speaking about their ';athletic' build.And agreed about your shoulders pitching forward even from first pics. Still would like to see narrower shoulder jacket on you. Just a more perpendicular drop of the armhole would help as I said before. I just think you are creating too much of a top heavy look. Note, I have somewhat similar issues. Here is a crude pic with juvenile painting(only have a mouse,ugh).
As for your shirt, I actually think it is too fitted. A bit grabby right below your pecs and around to the sides.
If you ever fully dislocate your shoulder from the socket, you will find the end of the acromion. I do not recommend this method even in the quest for exact sartorial measures.