I have just changed from Dynamite Halibut pellets in favour of the Bait Tech 16mm pre drilled, as the Dynamite seem to be falling apart more, lately when drilling them yourself, have heard this also from other people.
I use Betaine green groundbait and mixed pellet sizes in a half and half stick mix more these days, making sure your hook point is pulled into the ground bait end, rather then the pellet end, so as not to mask the hook point with a pellet stuck on it, works great.
Had loads of carp and 4 nice cat's on the 16mm Bait techs the other month. Tried them last week end though in another venue and they didn't do much, as I was trying for one of the 3 sturgeon in the lake, but got the middle sized sturgeon out over the week end on a single marmite flavoured chick pea I had prepared, with a lump of Edam cheese, never expected to get one on chick pea and Edam snowman, but thats fishing.