Chamber dimension, freebore -> 300PRC / Hornady ATip 250

[georgelza]

H hi all

Wonder if those that have had custom rifles build, 300PRC thats shooting the Hornady ATip what custom measurements did you go for (like Freebore), that works well with the 250gr ATips.

G

 

[high right]

Got my own Reamer from JGS. AW2 with freebore shortened. 060

 

[Emerson0311]

If I was going custom I would go 300 Norma. My 300 PRC is not quite enough to launch 245-250gr as fast as I want.

 

[georgelza]

explain aw2?

I would love to know what OAL (as that speaks to how far the 250 is seated into the case) everyone is running and freebore (resulting in boltface to rifling) space.
headspace i'd say as min as needed to get the case into the chamber.
anyone that might be willing to share a drawings would be appreciated.
G

 

[Jscb1b]

AW2: Alex Wheeler #2. SAAMI specs of the chamber size are too tight. You get "clickers" after sizing your brass. The AW2 reamer is .002 larger at the .200 line.