thanks Ash, have seen a pic of the first page before but it was in bad quality and I dont know where it came from. was going through the text now but dont find if the rim of the Gras case or the bolt head of the lebel was changed. hope someone with better french language skills will find this fact. like allways gun magazines are very careful with loading data not proofed offically. they talk about .445 -..446 lead bullets and than about .458 softpoints but was the softpoint pressed down to .445?
so far I was right the modification of the lebel into big game hunting rifle startet with 11 mm Gras barrel and the original gras chamber.

unfortunately they had also no original factory cartridge and the number three here is a Gevelot factory nitro loaded Gras

if I ever get a Gras barrel the modification of the turkish forestry carbine would be a nice project