My einstecklauf is like your post war EL and in 22LR. I had to order new slide adjusters as the ones that came on it had been filed and there was no way they could be adjusted to work in the chamber of my Thieme & Schlegelmilch drilling. Once I got the new slide adjusters it only took about 30 rounds to sight it in. It's minute of squirrel's head at 35 yards which is plenty good for no better than I can see today.