I made a big mistake, rifle dated 1935 (blue receiver).
Good on you for admitting your error. That says something of your character.
The 1935 rifles are beautiful. Some of the nicest Mauser 98 models made. The Brazilians were doing well financially back then and spared no expense when those rifles were purchased. Mind you, it was the middle of the Depression, created by the political agendas of Europe after WWI and firearms were relatively cheap in comparison to nowadays. All of those rifles were hand fitted to exacting tolerances and I haven't had one yet that's in excellent condition that won't shoot ammo loaded to Brazilian specs - 140 grain boat tail bullets at 2900fps from a 29in bbl with a ball powder that was very close to W760.
There is another difference between the 1908 and 1935 model. The bolt ways haven't been stoned as finely on the mod 1935 but that is quickly fixed with an hour or so of judicious stoning with a fine Arkansas or its equivalent.
I have two go to hunting rifles. One is a T3 in 6.5x55 and the other is a Mod 1935 Brazilian in 7x57. Both are loaded with 140 grain bullets to appx the same velocity and both shoot sub moa consistently.
I picked up the barreled receivers at a Kamloops gun show, maybe 15 years ago. An old smith had cut them down from new in grease rifles, shortened the barrel on one and left the other as is. One also was d&t for scope mounts.
When I had my shoulder replaced, I needed something with less recoil to hunt with that fall. I fitted a brake of my own design to the mod 1935, put on a custom stock and it turned into one o my favorite rifles. It's only problem is that it's a bit long with the brake but recoil is that of a 7.62x39 and velocity is close to 2900fps. What more can I ask for????
Good luck with your Mod 1935 OP. Some people prefer the blued receivers.
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