If someone is interested to know whether seating depth, within functional bounds, makes a measurable (ie actually meaningful in practice) difference in precision for their actual use, please just go test it with a sample size that actually has a chance of somewhat representing the population (at least 20rd), and with a metric that is meaningful (mean radius) and post your results. Can't argue with data that is collected sensibly.
Likewise, if you're already convinced that it does or doesn't matter - consider - how would I test to determine if it does or does not? Better to test, get data, and make a more informed decision on your process in future - may save components and hassle in the long term
Bookmarks