IOS XR : Netflow without having to use sampling?

Is it possible to have netflow active without having to use a sampler on IOS XR?

I have it setup fine on IOS XE and this has been fine but unless I add a sampler for IOS XE it won't apply it to the interface.

The problem we then have is if I set it to sample something like 1-in-1 CPU goes through the roof whereas if I set it to 1-in-1000 it doesn't capture all the data.

I feel like I'm missing something.

Thanks