Hello i have a 300 mk5 which i would like to rebarrel to 378 .i have owned a factory 378 before, which had some issues with the magazine[making it feed properly etc.] .Is it possible to to use some other ''setup'' for the magazine maybe spring clips, as used on some 98s for 500 jeffery ? or some other method ? if any one would happen to know about ? thankyou for any help suggestions etc

3.56 oal and .532 base vs 3.66 603 base ...