Agree with Ted. An above average shooter, but not a particularly high grade French sxs. The lack of a "name" hurts the value as well, and Martin was probably the dealer for whom the gun was made rather than the maker. Standard, single French proof--14,200 psi. A lot of those guns have had American 2 3/4" loads run through them, and they'll take it, but because most French doubles are pretty light, the recoil can be nasty. As Ted said, lighter 2 1/2" loads are available and should be used, unless the owner wants to get into 16ga reloading.