fourbore I would run a few more groups first. Sometimes a rifle needs a few through it to sttle it down.

1.5 inch groups are in my experience the norm for most factory rifles and factory loads. Yes we hear about sub MOA groups but we are not hearing from the majority of shooters. Shot a lot os rabbits with my old M 94 in 30-30 and it was a 1.5 to 2 moa rifle.

If the rifle does not tighten its groups after a few more rounds through it,I would take the forend off and just rest the action blosk on the sandbag/rest and see hoe it performs.