Thanks,Tim for the Centerfire HELP sticky info. ds7418, was that incorrect, that finding a fit is done by trying as many frames as possible? How DO you get the specs within .001"? [ and those 4 frames I mentioned were all "proper high pressure SB2 receivers"]
In my case,, i only had this "one" sb2 to work with,, and was determined to make the 308 fit this receiver. I got the specs from this web site FAQ,, then i used my tools I already owned,, simple "feeler-gauge",,micrometers,,etc.
I shared my project on this site to help others who might have to make the same modifications on a barrel.
My other sb2 belongs to my grandson,, its a 2005 -frame in 243.,,He is 4yrs old. Wifee told me to leave his alone,, and make mine work...
