Got one about 4 years ago. Stainless, old model before they started fiting safety catches. Unfortunatly haven't got round to playing with it properly yet.
Have an original .300 Rook on a Martini action but figured that .357 would be caser to reload. Shot the Martini with Black Powder, cases swaged from 30 M1 carbine & lead bullets resized to proper diameter. Haven't used it past 150 yards but worked well on both paper & goats.
Google "Greybeard" & check out both the "Handirifle" & Rossi" forums. Aparently the NEF in 357 mag has an overlong long chamber & a current fad is to convert them to 357 max.
Rook & Rabbit are great guns.