I went around and measured the trigger pull lengths on my older rifles and came to the conclusion that most commercial rifles I own, based their trigger pull lengths on WW1 era measurements.
The straight grip 03 was 12.5 inches
Ever shoot a straight grip M1903? The things hurt, you rest your face on your thumb, which is in line with the stock, not draped over like I shoot a Garand, my lips got bruised and it is hard not to have that cocking piece bash the lens of my shooting glasses.
A pre WW1 Mauser, was 13 and another 13.5.
The Swedes had to be big men for 1900 because those stocks were about 14.0 inches. I also have a WW1 Swedish sword, and from the blade length, they were big men.
I looked at my Smallbore Prone stocks, which I have to use irons and scopes, and found that I adjusted the buttplates to 14 to 14.25 inch trigger pull distances. This 1950's rifle had a 13.5 inch trigger pull, I added a 1/2" thick piece of pallet wood, and new pad, to make it 14.25"
I made this stock a 14" trigger pull, and I like it much better as there is more clearance between my eyes and the scope, and the bolt stops just in front of my nose. The wood also came from a pallet and the dark spot is a nail hole.
All I had to do with this, was pull the buttplate out, and then put a stack of washers around the post.
I found, no matter how tight you turn the resistance screws, they will loosen, the buttplate will move in, and you don't notice this when in a slung position. What I did notice was my zero's changing as I fired, I had to constantly change elevation, and once out of position, figured out it was due to the stock shortening. That is when I put a stack of washers around that post.
You can see the washers better on this stock
When I had Richards Microfit build this stock, I specified a 14 inch trigger pull
I have always had issues with modern rifle stocks being too short and having the scope eyepiece too close to my eyes. I think they are building the things for the 5' 7" people, not the shooters who are over six feet tall.