Thank for replying
I zeroed the rifle at 100yds spot on trouble is the turret was then set at 400 on the dial so I reset the dial back to 100 mark on drum fired rifle spot on only trouble is when yo turn turret to the 1000 or number ten on dial it only goes up to the 800 or 8 mark, so being me I took the top off removed screw and measured it and the length of thread is shorter than stated in Peters book and it looks to have been shortened on the thread don’t know why , what I need is a new elevation screw making to the correct length , as for rifle I presume it’s ok the mounts not original it’s central to barrel it’s been on another No4t and it makes no difference the elevation screw is just the same you can’t get it passed 800 or 8 mark what I need is some one to make new screw to correct length