Sheepdog,
The speed strips are homemade. I use an old discarded rubber shock-strap, the kind from
auto supply stores with the metal hooks in each end. You just take an empty shell case of the
caliber you want to use, and hammer it thru the rubber with the hammer. You use them just like any other speed strip by inserting two rounds at a time and kinda twist and pull the rounds
out of the strip. Cost is nothing if you have an old shock-strap laying around. Porbably cost
3 or 4 bucks if you have to buy a new one. They work great--rounds won't come out accidentally.
Good way to accomodate 44s-which I have never seen made commercially.