doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com Post 1926 Manufrance 12 ga

I'll start by posting the pictures of your Robust and will offer up that the model 222 was made from 1946 to 1980 per Myorkas' book. FAB500 might give more information.
-- Manufrance Robust
-- Double Proofed at the factory as a finished arm. This from Fab: after 1926 manufrance ceased using the customary saint etienne proof house, and ran their wares through an in-house facility.
https://www.doublegunshop.com/forum...;Main=39635&Number=595336#Post595336
. . . . .- one arrow thru target = 850kilos = single proof
. . . . .- two arrows thru targets = 1100kilos = double proof
. . . . .- three arrows thru targets = 1300kilos = triple proof
-- Canon Frette - is the classic "stepped" or "sleeved" (In the sense that an artillery piece has "sleeved barrels") MF barrel.
-- "Hercules Steel"
-- "The rifled barrel" ("raye") probably has striations on the last few inches of the barrel: I believe it can spin a ball or act as a spreader for shot shells (barrel used for Becasse?) but will let others chime in.

Check out this line - which is perhaps the finest explanation on the entire internet of the French practice of shallow groove refiling in a shotgun barrel, its result on shot-shell patterning and on bullet/ball accuracy.
https://doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=587581&page=1







and by the way, I don't see a "222" but there is a "32-S" (1930-31)