Big Z
If you go with the 25acp you'll never look back... It is far cleaner and very easy to use.
If you are shooting BH-209, it unproven there. I have loaded the 25 acp case with a small rifle magnum primer and shot several loads of BH without a problem, but I have not shot in cold hunting situations... but I would not hesitate to try it. Maybe after hunting season in January I'll run out to the farm and give it a try.