George Gibbs Falling Block Rifle – .450/400 3¼” (.400) (30446)A fine example of a classic British dangerous game rifle, this George Gibbs rifle is chambered in the highly regarded . 450 400 3 Nitro Express (. 400) a cartridge famed for its excellent balance of stopping power, manageable recoil, and deep penetration on large game. This rifle features a traditional falling block action with elegant period engraving, complemented by a well figured walnut stock showing attractive grain and honest field wear