I found that Lose Powder is best as you can Custom fit your load for the best accuracy. BUT>>>>I also use Pellets. I found the 2 50gr Pyrodox Pellets gives me great accuracy and results in most of my inlines, it's a perfect load for not too much and not too little.
In one of My Accura's I use 110 gr's of Pyrodox RS and the other I use 2 50gr Pellets, both are acceptable and I would'nt feel handicapped using one or the other if I had to.
If Im out of Lose Powder I'll use Pellets. But I have found the (3) Pellets of 50gr Pyro are TOO Much. So find your Happy Spot Load then try what's close to it with Pellets, if they work then I dont see no need to use Lose. The 30gr and 50gr Pellets can be mixed and matched to find that spot. But if your a LONG range Shooter and what Superior Accuracy, go Lose.