Hi All Please help!!!!! I am living in Namibia and advice out here is on rather short supply . I do have in my collection a 1908 Mark 3 Lee Enfield .303 which I have customized recently . The barrel was ( is) badly corroded and the front part was shot out . So I have shortened the barrel by 6 inch , cut a new crown to the barrel . shortened the wood by 6 inch to keep the original shape of the rifle . I have also fully bedded the barrel across the entire length so that it is absolute solid in the wood . I have tested it with the open sights and it shot well and the grouping was under a 3 inch on a 100 m . Every now and then a flyer appeared but I guess that is acceptable . I must also mention that I am reloading my own ammo for all my rifles - including the .303 . But old age is catching up with me and the eye sight is slowly fading - which made me decide to fit a Pecar Berlin 4 x scope . I have checked scope mounts and rifle mounts and all are tight and solid . Have also tested 3 different scopes on the rifle and the effect is the same . Every first shot is 3-5 inch high - then they settle back to a 2- 3 inch grouping . Allow the barrel to cool down then the first one goes high again . I tried different loads , projectile weights , primers ,. Bullet seat depth – Nothing works - the effect stays the same . I tried shooting with a clean barrel and a fouled barrel and it seems that the more copper deposits in the barrel the better the grouping becomes . but the first one is still high . Please help !!! I am at the end of my own advice here . I really would love to use the rifle for hunting here as it is so nice and compact now with the shorter barrel . Please try to mail me back directly at firstname.lastname@example.org as I can not always enter all internet sites from here . Thanking you John .