bipbigbore

Why not just go and shoot it over a Chrony at the range
with a range of loads and see what it does before
changing anything.

At least you will know what the next step is once you have
done this if it's not shooting correctly.

All these devices for scope / bore alingnment etc are all
very well but all you need is to hit the target and go from
there.

500 Nitro