So on the topic of fire forming,not sure this is the correct forum,but here goes...Hornady makes hydraulic forming dies to spec.So why not have a die made to your chamber,either by the chamber print of your reamer or sending in 3 fired cases. The difference in cost of bullets,powder,primers,and of course barrel wear would be more than offset by having formed cases that you can just then size as you would normally after fire forming.And as an added bonus,you can get the neck reamer to go along with the die,and eliminate any neck wall inconsistencies at the same time.