John
You are quite welcome to come and try mine(Sabatti) and buy it if it suits your needs:). A word of warning , from someone who is new to the 450/400 cartridge and relatively new to DR's, there are 2 sizes of projectiles 408 and 410 and YES it makes a difference if you use the smaller one in a rifle that has been regulated for the larger one. Tends to give you more than reasonable results with the correct size projectile. The only reason mine is for sale as I have had the good fortune to purchase a LEFT handed Merkel in the same calibre, so if anybody is interested in a Sabatti Big Five in 450/400 please let me know