Re: .280 Ackley Improved build questions
The best way to get the reamer you want is to buy that Norma brass and a box of those Berger bullets and assemble 1/2 dozen or so and ask your tool maker how many he would like for samples to grind the reamer to. Chambering reamers don't make good sizing die reamers. When you re-size a case it needs to be slightly smaller than the chamber for ease of chambering a round. If this is a hunting rifle, and I assume it will be with a #3 contour barrel, don't get the neck too tight. You might consider using Nosler .280 A.I. brass as it's already formed to A.I. which would eliminate just on more variable that fire-forming will introduce. If ya' build a rifle with a tight necked chamber, make sure you mark the neck diameter on the barrel along with the caliber.
"Shoots real good!": definition; it didn't blow-up in my face. 1993 graduate Montgomery Community College 2yr. gunsmithing program
Last edited by shortgrass; 04-22-2011 at 06:35 PM.