What Ted said Kyrie.
Would a 1970s Spanish double, of decent make, come with a hang tag and recommended loads?
What load would have been recommended for a 850 or 900 KGS 20g? 24 gm?
12g? 32 gm?
Thanks.
I think we have a disconnect here.
A stamp of 850 or 900 on a Spanish shotgun is the identifier of the proof standard applied to and passed by the shotgun in question. That proof stamp is not germane to what ammunition should be used/not used in the shotgun.
The commercial ammunition loads (shot charge weight and muzzle velocity) that can be used depend more on what kind of shotgun is under discussion than some speculative idea of chamber pressure. All artisanal Spanish shotgun fall somewhere on a continuum that ranges from light game gun, through medium game gun, to heavy competition (live pigeon) gun.
Shotguns at the far end of the continuum at the heavy competition gun end can digest a steady diet of heavy (shot charge weight and muzzle velocity) commercial loads.
Shotguns at the far end of the continuum at the light game gun end need a diet of the light (shot charge weight and muzzle velocity) commercial loads to avoid blown out chokes, cracked stocks, and general excessive wear and a shortened useful life.
Medium game guns fall between these two extreme ends of the continuum.
A commonly heard comment goes like this; “A light game gun is carried much and shot little. A medium game gun is carried little and shot much. A heavy competition gun is not carried and shot as constantly as matches are available.”
Please note all the above discusses only commercial ammunition. Hand loading for a Spanish artisanal shotgun is just another world and is very heavily constrained by what kind (light, medium, heavy) gun will be used to fire the handloads.
The above applies to guns regardless of whether they were made in1927 or 1995, and regardless of the Spanish gun maker.
