If it hits high, what I did was find a long straight slot screwdriver bit, cut the shank to the desired length. I removed the original sight, it was soldered. After measureing the seat for the sight and the diameter of the sight shank, I got the shank down to about .002 larger than the seat. I froze the sight in liquid nitrogen, seated it and once warm again, it was locked in tight..
The problem for me was always finding a tall enough sight, the screwdriver bit works great.