I was informed by hooper ordinance (where Im getting my bottom metal from) that his bottom metal accepts both AI 300 wim mag magazines and 338 lapua mags. My question is that I am building a 7/375 ruger and want to use the new 195 bergers. the case overall length could be as long as 3.77 which is too long for the 300 win mag magazines. I can use a 338 lapua magazine but have no clue how that will affect the feeding or any other problems. I understand I will probably need to modify the feed lips but other than that what are the problems in doing this? a 338 lapua mag is 3.885 inside COAL so this will give me room but I want it to feed with no problems from the mag. what say you with the knowlegde? has anyone tried this on other cartriges? I have done multiple google searches with no real luck. thanks in advance.