Do NOT Try This At Home! CZ550 Photos Have Been Added.
Apparently, from a Google search, at different times Parker Hale used all kinds of actions, ranging from Mauser and FN to Santa Barbara and Midland Gun Co. I would guess that the age and markings may shed more light on the type of steel.
Gentlemen,
I just like to repeat here that this no reflection on Parker Hale rifles at al.
The load was far beyond anything the rifle was designed for.