HI,
Sorry for been late.
As you probably know we have a lot of 1090 rifles here.LOL So rebarreling and reforming for .375 H&HMag. is very common.
A freind of mine have a Interarms Mark X '98 in .375 H&H Mag.and after some shooting found that the lower lug ahve moved back. Also, a gunsmith I know is now trying to reapir another rifle with the same problem. IMHO it is a bad idea to convert the 98 Mauser to the front.
I will try to post some pictures of the 1909 magazine for you to see the differences. Some years ago I sold my .375 H&H MAg. on a 1909.
What magazine releace do the 1908 Brazilian Mauser have?
Thanks
Martin