It should fit OK, as many other loads of slower powders for the 32-40 on the data I saw were around 29 or so grains. H108 is either small flakes or spheres, so it goes in the case like water. I used H110 years ago for pistol loads, it metered nicely through the measure.
When I was into pistol loading, my procedure was to charge the case, look into the case mouth for an overcharge, then put the case in the press and seat the bullet. The case never left my hand once it was charged, it went right to the press for the bullet. Can't do this with a progressive, but I never got into that.
Loading at the range may have been involved here. I never did this, as it is far too easy to become distracted. I know some gents like to use the same cases for consistency, but IMHO loading at the range is another disaster setup.
