Good info.Thanks h broemel.

What I'm up to is trying to get some pre-construction info for a very large - between 1100 and 2400 grain - projectile in a brass 12 ga shotgun case. My goal is:
1) Subsonic velocities with 65%+ load densities,
2) Burn all the powder in a 30" barrel, and
3) Keep max pressures below 30kPSI for sure, and 20kPSI preferably.

Someone suggested that Trail Boss might be the "solution". I use QL to paper-whip wild ideas I get in order to get in the "ball park" before I start testing real-life loads. This use of QL has saved me considerable time and money.

If I understand you correctly; Trail Boss will never be "in" QL because it's burn characteristics are too far "out" to be described by QLs algorithms?

Paul