As a student of QuickLoad, I have run a lot of models that are proven at the range.
There are some cartridges that work well with varying barrel lengths, powders, bullet design and weights.
These are usually mid sized cases for the bore diameter, 300 Win Mag being an exception.
What I'm looking for is peak chamber pressure coincides with the powder going from progressive to digressive burn, 95%+ case fill, on a barrel time for barrel length and a low muzzle pressure, with many different combinations of powder , bullet etc. 308 Win, mid sized 6.5mm cases, 6 BR based cases are some.
