I don't have a problem with porting from my copy of QL to my copy of GRT. Since I've paid the license fees for QL and upgrades for about 20 years, I figure this is no worse than getting a second opinion. Also, publishing an occasional piece of information is something NECO's Ed Dillon (U.S. QL distributor) has said is OK as I think he feels it encourages people to buy the program. However, spreading the QL data around wholesale to those who haven't bought into it becomes an IP rights violation.
I've found with QL it is pretty common for case volumes to be minimum for cases I've seen. That produces errors on the high side of pressure to discourage loading too warm. For pistol cases, though, I almost automatically add a grain of case water overflow capacity as I've found that to be pretty close with .45 Auto, .38 Special and .357 Magnum among others. With rifle cases, like .308 Win, it can be one to three grains low, depending on the make of the case. Also, keep in mind that for brass being fired at peak pressures below about 30,000 psi, you want to use the resized case capacity. For those above 40,000 psi, you want to use the as-fired capacity. Between those two numbers it varies with the cartridge as to whether resized or as-fired capacity will give you the most realistic results and you just want to compare your prediction with a maximum published charge to the velocity and pressure reported by the powder maker (who usually is the only one with average performing data powder for load development and testing).