Hey bugshotgta...
You want to load pellets into a port loading rifle yes? And it can get a little fiddly down in the port in cold weather right?
I had this idea last night... this morning actually. If your handy with tools, get yourself a piece plastic sheet about .030" - .040" thick. Nylon, Teflon, Delrin... that kind of thing.
Cut it so it's about 3-4 inches long and about 3/4" inch wide. Drill a hole in one end, about 5/32". Using a round file, open up that hole so a pellet goes thru it with a bit of drag... not enough to distort the pellet, just enough so that the pellet can't fall thru on it's own.
Next... cut a slot from that hole. A slot wide enough so that a pellet waist will fit into the slot and slide back and forth with a bit of drag.

There ya' go... load the pellets into it from the hole until it's full, then feed each pellet from the slot to the hole... push the pellet directly from the hole to thebreach chamber.
This is all theoretical on my part... and I don't know exacty what yourbreach port looks like,butthismight work.
Cheers,
C