https://en.wikipedia.org/wiki/Nagant_M1895 https://en.wikipedia.org/wiki/Nagant_M1895 It pushes the cylinder forward against the barrel and the casing is longe

https://en.wikipedia.org/wiki/Nagant_M1895 https://en.wikipedia.org/wiki/Nagant_M1895 It pushes the cylinder forward against the barrel and the casing is longer than the bullet, entering the barrel to form a seal.