RPP recently posted a very similar thing about the new 336's on Marlinowners. He went on to say he will only "soup up" (my words) 336's made between 1970 and 2009. Prior to 1970 he doesn't feel the metallurgy is as good and post 2009 he says the lightening cuts have compromised the 336 receiver. This was in reference to his .36 RPP cartridge.
