Reeder Custom Guns - They look goofy but the charge should fire form, blow out.

WB
They look goofy but the charge should fire form, blow out.
Saturday, September 19, 2026, 12:13

I shot some of them in my Contender. The 2.08” or so cases need a bit of trimming to get closer to the 1.97” spec. for the .400 GNR. Rather than .30-30 brass this is thin wall .38-55 Win. Should have an easier time allowing cast bullets of proper size. The .30-30 cases are all over on thickness at the case mouth. Usually they run 0.008-0.011”, the .38-55 are 0.006-0.007”. Irv has a custom .400 GNR Marlin. We have (100) rnds. to work with.

The one on the left I used an elliptical .415” sizer ball but it took lots of pressure to expand the walls. Then I sized back down to .400 GNR (10mm). But I think letting the gasses work on these new virgin cases is the best way. It works them less.

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Trimming ant trying to load up .400 GNR for Irv - WB, 2026-09-18, 15:34
- They look goofy but the charge should fire form, blow out. - WB, 2026-09-19, 12:13
  - I need to get my older Marlin 35 Rem rebuilt for 400 GNR. - JPL, 2026-09-19, 20:12
    - No, it’s Irv’s. On a 336 I think. Maybe he’ll bring to HHC. (nm) - WB, 2026-09-20, 06:54
      - I'll bring it, if I don't forget it. (nm) - IC, 2026-09-20, 13:50
        think there will be several custom Marlins - Gary Reeder, 2026-09-21, 16:05