MClark, Do you have a website showing your stocks? Maybe why mine feels short. Do you change the drop and length to get it to feel "right"? I have thought of putting a spacer on mine.
There are stock pictures on this page.
The straight grip Contender 28 gauge is mine with a long pull.
http://www.dvhcustomguns.com/page12
I change length, drop, comb height so when I swing up the rifle I am looking through the sights without adjusting my head.
Of course everything changes with different clothes or shooting position, I set up for standing as that is the shot usually needing to be taken quickly.
Expensive stock makers, like Holland & Holland, have special stocks where all dimensions can be adjusted. This is for regular people.
Use a crappy stock you can cut and grind on. Nice and fancy happens latter.
Fitting a stock I start with the length. Ignore the scope. Hold rifle up so thumb is a comfortable distance from face, must be enough not to get whacked in nose by recoil (People will give a specific dimension but what feels right for your body and style is what you want.) is there a gap between butt and your shoulder? If so cut a spacer and duct tape it on. Put to shoulder multiple times, is it right, shot, long? Adjust as needed. Go to range and shoot, still good?
Drop --hold rifle up as see where it sits on your shoulder, move spacer as required. Test fire.
Comb height. Still ignoring scope. With rifle shouldered is the cheek weld right? Too low add material (tape on leather, cardboard, wood, lots of tape.). I have a big cheeky head and have to remove material, a big rasp or belt sander works. At this point minor adjustments may need to be made in other dimensions until when rifle is brought up without thinking everything fits.
Now adjust the scope fore and aft so your eye is in middle of relief, if a high recoiling cartridge have it near maximum eye relief. With your eyes closed shoulder rifle, when you open them are you centered up and down, if not change the height of the scope rings. If your eye is left/right to the scope add or remove material till centered.
Go shoot this ugly thing and check the fit in reality. If done right you can look at a target, close your eyes, swing up the rifle and you will see the target in scope without moving to compensate for the stock.
Now send this as a pattern to have the pretty stock made.
M