Since I got the Swedish Rolling blocks I've been looking for a ammo carrier for the cartridges. The slide will work as is, but the pouch I got was not the standard size, I got the magnum since I am going to make a wooden insert with the proper size holes drilled into it for the selected caliber. I have a number of calibers to use this for, some long and some short. 45-70 to 9.3x74R. I thought I would pass this along to anyone who has just got one of the 12,7x44R rolling blocks. These are from Hunter company, the pouch is as I said the magnum size as I wanted to use the same pouch for different calibers, there is a standard size also for those who are only going to use it for one length of brass. The slide is for the S&W 500 revolver brass, it also is from Hunter, and it seems to work just fine. Here are there images.