BoydAllen
Gold $$ Contributor
Fire forming shots don't bring the body out to a tight fit, and shoulder diameters of reamers are pretty similar. The only issue would be headspace. What is the difference in the neck? One way that I fire form involves using .22 caliber bullets. If the neck diameter of your forming barrel is smaller than the barrel you are forming for, this might be for you. If this applies. PM me, and I will walk you through it.