Haberly?

[km2]

I have a rifle, appears to be custom rebuild. Only markings on it are on the barrel, HABERLY and .303-6mm. Pictures attached. Any info would be appriciated.

 

[SDC]

This appears to be a custom Winchester High-wall done up by Paul Haberly in a wildcat cartridge; Haberly apparently worked at the Chicago Gun Center up until the 1980s, but that's all I could find through google. Since this is a dedicated single-shot target rifle, you might be able to find more info on it on a board that specializes in single-shot or target rifles. HTH.

 

[km2]

Thanks for the info. I'll try your suggestion.

 

[T. O'Heir]

"....303-6mm..." Likely 6 mm Musgrave. Used for springbok in South Africa. A necked down .303 British. Launches an 85 grain bullet at around 3000 fps. No idea where you'd get proper load data though.
You'll have to do a chamber cast to be sure. The rifle hardly looks big enough for a 2.222" cartridge. Custom rifle. Custom ammo. Custom dies.
There's a set of Lee dies here. http://www.titanreloading.com/6mm-musgrave-3-die-set-steel
RCBS makes 'em too, but only on Special order and horrendously expensive.