I have been having a few issues with my Chapuis SMS 450-400 3". I could really use a little brain power and experience.

The first box of factory Hornady DGX shot into a little over 2 inches at 100y with a Leopoldo vx6 1-6x. Perfect left to right but the left barrel was a touch high. This is shooting from the sand bag bench.

I've been playing with reloading but I am headed to Africa and I shot a box of factory DGX to zero it. It seems to shoot the left barrel 5+ inches higher then the right now. It's from a bench but I just can't understand it.

Any thoughts?