Very much so!
When I grafted my C35 rootstock earlier this year, I took the top sections and stuck them in a propagation box (bought at HD used the Tomato pellet (large) jiffy peat box) with a heating mat beneath.
I did not use rooting hormone, and something like 92% rooted and are growing well.
Basically, make sure the cutting is short enough to fit under the lid when stuck in a pellet. Make sure the leaves are removed for the portion of the stem that is in the pellet. Trim the tips of the remaining leaves if they are large in order to prevent too much transpiration. Ensure the pellets are moist, but not in standing water.
Not much to it, check the pellet weekly, and when roots are observed, put them in pots in the shade.