Dale53,
I ran some pin gauges thru my new 44Spec FlatTop (cataloged item) and my chambers measured .431.2 (which was loose), then I tried a .431.5 (which was tight) . Based on this info, I haven't slugged the bore, which size sizing die would be best; a 430 or a 431? I typically cast a BHN of between 12 to 15 and with this gun I plan on keeping my velocities around 1000fps or lower as I feel like it will do everything I need at the range I will be hunting.
I have read and re-read articles on throats/chambers/bores but it still as clear as mud.
I really enjoy reading your posts and I have learned a good bit from them, so I encourage you to continue the good work for us newbies.
Thanks for any help you can offer.