.308 x 1.5 reloading info needed

[danyboy]

Bought a rifle from an estate. Caliber is .308 x 1.5. Unfortunately, very little info is found about it.
Does any old timer here have any experience with this caliber and any reloading help would be welcome.

[.30br]

wen you say .308 x 1.5 = is the 1.5 is the lengt ov the brass
they ave  3 caliber y know they have close to this lengt
1) the .30BR =is parent case is a 6br nek up to .30 very effective in score choting 
2) the .30x47= is parent case is a .308 savage modifier
3) the .30 cannuck = is parent case is a .308 savage modifier
the 2 last you se some chooter use this in IBS match in U,S.  and in QUEBEC