My 14 bore has a 13.5" length of pull. Taylor's 16 bore J. Lang also feels perfect. I think if a person does enough shooting,
the actual length of pull becomes much less important. I can easily shoot my daughter's rifle, with it's 12 1/2" pull as well.
You simply move your shoulder forward or back a bit, depending on where it needs to be for you to aim correctly, no matter
what the length of pull is, within reason of course. Taylor has a couple Hawken rifles in the shop with 16" pulls. I could shoot
them and maybe well, but they do feel a mite awkward. Kinda like in the buck and doe contests where the lady must shoot your
rifle, or vise-versa. I find it is easier to shoot a short pull rifle, than one that is too long, imo.
What works offhand for me, also works off the bench.