Previous thread & not much to add
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=641377

The McCracken Research Library at the Buffalo Bill Center of the West has a Hunter Arms Co. Pressure Curve dated June 10, 1929. It is not labeled as such but was probably generated by the Burnside Laboratory of the E.I. du Pont de Nemours & Co.
12g 3” ‘Record’ 1 3/8 oz. shot presumed 1275 – 1295 fps = 13,250 psi + 10-14% (!) for piezo numbers
12g 2 3/4” ‘Field’ 1 1/4 oz. shot presumed 1330 fps = 10,750 psi + 10-14%

The issue with LRWF (and 'Long Cracked' Smiths) is recoil and not pressure. The LRWF used the standard Regular frame, but it is likely that the wood at the head of the stock was slightly thicker.
IMHO the gun would have significantly more value if the head of the stock was examined and either glas bedded or cyanoacrylate impregnated.
If 'touched up' means honed then wall thickness measurements would be wise but .732" would be a typical bore.
A LCSCA Research Letter does seem to help in sales
https://lcsca.clubexpress.com/content.aspx?page_id=22&club_id=43784&module_id=245742

Here's a non-ejector Specialty LRWF
https://www.guns.com/used-guns/p/l-c-smith-specialty-grade-long-range?i=509664

Over-priced non-LRWF but 32" barrels Ideal
https://www.gunsinternational.com/g...deal-grade-12-gauge.cfm?gun_id=103154694

https://sites.google.com/a/damascusknowledge.com/www/home