![Image](http://www.hunt101.com/data/556/23947356_Loads.jpg)
I wanted to be able to feed these through my 356.
The key is the carrier. I bought a pre-64 carrier on Ebay to modify. I used the pre-64 carrier because I believe it is forged and the post -64 carriers are cast. I had to remove a lot of metal and I want the stronger forged part. The modification requires cutting the block back that stops the head of the cartridge and cutting the lug at the top of the carrier that a lug on the bolt pushes to raise the carrier.
This is the standard post-64 carrier and the modified pre-64 carrier in front.
![Image](http://www.hunt101.com/data/500/2394794_Carriers_Side.jpg)
The other part that stops bolt travel on the post-64 is the carrier screw. It is a single long screw that passes completely through the receiver. There is also a bridge cast across the lever slot that would stop bolt travel if the screw wasn't there. The pre-64 carrier does not have the bridge and it uses two short screws through both sides of the receiver to hold the carrier thus the slot in the carrier is left open. I think the bridge is cast into the post-64 carrier to strengthen the part. Here is a view to show this difference between the post and pre-64 carriers.
![Image](http://www.hunt101.com/data/500/2394794_Carriers_Back.jpg)
This view also shows the original long post-64 carrier screw and the one I cut to use with my modified carrier.
I am not done with the fitting yet. The pre-64 carrier is larger in every dimension than the post-64 carrier. I had to do a lot of grinding to get it inside the receiver. It is longer and also needs to have clearance ground into it to clear the back of the loading gate and the cartridge guide. I spent about 4 hours whittling on it. It is hardened enough that it can't be cut with a hack saw or file so it is all grinder work. The lug the spring rides over also needs to be ground down. I also need to secure the pin in the right side of the receiver for the carrier to pivot on. But it does work! I loaded and cycled both the 2.69" cartridges and the 2.71" cartridges pictured above in it.