I have a Tikka t3x varmint with the krg Bravo chassis I've never tried that particular setup. But if you remove the plastic foregrip you can mount Tire weights to the aluminum chassis underneath I was able to add 2.5 lb to my rifle exactly where I wanted it. The ones I purchased were from Amazon they were black had one side sticky tape they're meant for Wheels so they will not come off by accident. You can't even see them when you put the foregrip back on, also you can trim them fairly easily to make them fit where you we're U Want. They make them in 1/4 to 1 oz weight they're fairly small and you can stack them on top of each other to give you a great balance point
This worked for me very well because it allowed me to put the the weights exactly where I wanted to to balance out the rifle.
Also did I mention they were $20 for 9 lb box