Originally Posted by Trickymissfit
have never seen a 37.5 degree reamer for the 22-250. There are several improved 22-250's out there besides the Ackley. The Shannon uses a 35 degree shoulder with .020" taper in the case. This one according to Ackley shows very little growth in the shoulder area (doughnut). Then there is the Durham Jet that uses .243 cases with a .30" neck length and a 40 degree shoulder. I know of one that uses a 28 degree shoulder, and another that uses a 30 degree angle.
You are right Gary ,The standard shoulder on most AIs is 40o and if your going to pay to have a
reamer cut you might as well have it cut the way you want. (It cost the same) Dies are another
issue. You can make them yourself of have them made.
If single loading then 40o is not a problem but can be in a repeater.
I would say If you want less than 40o and can find a set of dies to match what you want,
that would be the easiest way to go.
J E CUSTOM