Re: accuracy awp ,schmidt and bender take a dive
Hi Chris, good to see you still kicking buddy, say hi to the missus from mine and if you get a trip organised to the fatherland i'll show you all the S&B's you want to see..
thats one of the issues i was on about. repeatability of the turrets, ive heared of many NXS and Leupolds with non repeatable turrets, ive not heraed of any S&B PMII's with the same problem, i have heared of a PMII with repeatable, but not what the click value should be adjustment, which suggested to me a metric engraved moa adjustment.
There is an inherant problem in all 2nd focal plain scopes, it is to do with the way the scope is built and the position, within the mechanical internals of the scope. as you wind up the magnification, the possition of the reticle within the actual scope moves, this is why you see no apparent size increase or decrease in the reticle, it moves in relationship to the possition of your eye and to the lenses front and rear.
the tracking of this movement is only as good as the machining and fit of the parts which interact with each other to allow this movement, tollerances, in materials, machining and assembly in this area will see you with a different zero from lets say 6x to 14x.
on a 1st focal plain scope, the reticle stays in 1 possition, other parts move when you up and down the x value, which is why the reticle apparently changes size (it doesn't realy change size, at least not in relation to the size of the target). the retciel is fixed withing the elevation and windage adjustable internals.
if you like, a 1st focal plain reticle is adjsutable through 2 axis. up down, left right.
a 2nd focal plain is adjustable through 3 axis, up down, left right back and forth.
the more directions of adjustment, the more the chance of inaccuracies.