This is how it is done on hundreds of kitchen tables just like mine![]()
.Personally I line mine up with the center of the firing pin projecting out the back end of the bolt...and Ive hit several targets at 700-1200 yrds ( back when vision was good and my heart beat wasnt visible in the scope crosshair jumping at every beat LOL).
Hmmmmm...... I like that. It could be further improved by removing the pin and looking down the pin bore.
It still isn't perfect, but it has to be FAR superior to levelling a scope that is canted to the bore.