I just picked a 336 in .35 REM. It has the 2/3 magazine tube with 20" barrel. It goes along nicely with my 336 30-30. I want to get another 336 in 30-30 with the 2/3 magazine tube with the 20" barrel. What model 336 should I be looking for? Thanks in advance for any help. You guys on this forum are really helpful.