All factory made guns are built to what someone decided was the average size shooter, Unfortunately the majority of us are NOT average size. Length of pull, cast off and drop all affect how you line up the sights. You will never know how much better you can shoot unless you have a rifle that actuallySeeking knowledge:
I see a lot of folks take issue with Length of Pull on here. I'm not a small guy and having shot many rifles (well) with various lengths of pull, I find it hard to believe that the difference between 14½" and 13" will make or break a shooter (unless you're Bill Brasky). Some of the most popular, well-loved, lever-action unmentionables built ca. 1866 have a 12½"-13.38" length of pull.
So what's the deal? Why ask that question in every sale ad for production rifles? I can see it being a factor in a nice, custom build, but for regular schmos, does it matter that much?