Hiya Mate,
Check out this guy, he has the same rifle as you and I have one as well.
He uses 87 grain V-Max behind 44 grains of H414.
I use the same combinations and get incredible accuracy.
I can usually get .4" groups at 100yds and 1" at 250yds.
With the rifle you have and that combination you just cannot go wrong.
Its better accuracy than a lot of custom rifles.
If you need some cases I have about 60 once fired norma cases and I am sure I could let you have 100 87 grain V-Max if you need em too.