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338 LM imp Mags

Does anybody know which magazines will fit the 338 Lapua improved cartridge ? I can get one maybe two rounds in my AICS CIP 338 LM magazine before they stop from the groove that runs vertical on each side of the magazine. The blown out shoulder Is too wide to go further than the groove in the mags.
 
its not uncommon to mill those indents out. Google “weatherby tacmark” to see what I mean.
 
the picture shows that the indentations that keep you from running a 338AI due to case width are milled out of the magazine. In this case its likely a 30-378 weatherby, but same issue. This is just to show one way people are solving your issues.
 

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the picture shows that the indentations that keep you from running a 338AI due to case width are milled out of the magazine. In this case its likely a 30-378 weatherby, but same issue. This is just to show one way people are solving your issues.
This is what I did to make 300 WBY cases fit in a 300 win mag magazine.
 

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