Oh it is an interesting ongoing project.
With BP my volume is low and I am only getting 700-750fps with a 50gr soft lead bullet, not acceptable and not even close to full pressure, hence my thought to use smokeless based around the 25 ACP loads.
I got an email back from Hornady, they are saying 1600fps to open, but a 25 cal FN bullet for small game should work well anyway, even without any expansion.
I have thought about a modified mold but do not really want to spend too much until I have a legit plan of attack and idea of cost, so all the cheap and easy things get worked out first.