GK

I don't know how the lengthening modification was done on my standard M98 Mauser for the 404J cartridge as I bought the rifle in its current configuration. Every part including the stock is originally numbered so it looks like the mag box has been lengthened and the feed ramp shortened but nothing new added. Maybe some work has been done at the rear of the action but without a stock standard Mauser in hand I can't compare.

One of the reasons I would go with the 404J is that it is a cartridge that survived the down turn in the 70's and 80's after Kynoch ceased manufacture of ammunition leaving only RWS in business and Norma providing some special runs of ammunition for other companies such as Parker Hale.

IMO the 404J is now leading the charge in resurgence of the British and German cartridges for big game hunting and components are readily available from many manufacturers including those in the USA. The 10.75x68 is a good cartridge but not so versatile as the 404J if wanting or needing to load up a bit. The 425WR has always been a bit of an odd ball even though it enjoyed a fine reputation as a killer cartridge.

I see Von Gruff has entered the discussion, him and I correspond regularly and have swapped data and projectiles for our 404Js. VG has made himself a magnificent shooting 404J from a standard Mauser and I would have no hesitation in standing shoulder to shoulder with him facing a charging animal while he has that DG gun in his hands.

Good luck with whatever you decide to go with and keep us posted.