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Thread: 38-55 rifling - 3 or 4 or 5 groove?

  1. #21
    Boolit Man
    Join Date
    Mar 2009
    Location
    SE Ks
    Posts
    128
    My JES 3 groove rebored Marlin likes both .377 and .378 sized bullets with a slight preference for .378. Started out with the Lee mold and switched to an Accurate 38-250B plain based mold, much easier to cast good bullets with. The rifle likes both bullets though with the lower velocity loads I typically use. 10 gr Unique or Universal are great for plinker type loads, 31 or 32 gr 3031 makes a fairly stout hunting load. Both are really accurate in my rifle.
    I use the RCBS Cowboy dies with the larger neck expander to keep from resizing the softer bullets I use during bullet seating.
    I've only used the Starline 2.082 short brass and it works great in this setup.

  2. #22
    Boolit Master
    Join Date
    Jan 2013
    Location
    Baldwin Co, across bay from Mobile, AL
    Posts
    661
    I just got 50 of the Starline 2.082" brass today from MidwayUSA. The expander in the Lee die set seems to work, but doesn't expand the neck as far down as I would like. That will be one of the next things I make, an expander plug so the bullets won't be hardly as tight in neck. Do you know what diameter your expander is?

    I suspect the lower velocity loads will be 90% of my shooting since that's all that's needed to put holes in paper or ring steel gongs.

    Now, just playing a waiting game until JES gets my barrel shipped.

    Ken H>

  3. #23
    Boolit Master
    Join Date
    Mar 2007
    Location
    Red Deer Alberta
    Posts
    179
    What R.O.T. will shoot 250-300gr bullets ? The factory win 1894 is like 1-20 I think?

  4. #24
    Boolit Man
    Join Date
    Jul 2017
    Posts
    76
    Quote Originally Posted by Pioneer2 View Post
    What R.O.T. will shoot 250-300gr bullets ? The factory win 1894 is like 1-20 I think?
    I talked to JES about my 38.55 project and he is using a 1:15 twist. He also recommended the 250 gr. bullet, but that the heavier (285gr.) should work also.

  5. #25
    Boolit Master
    Join Date
    Jan 2013
    Location
    Baldwin Co, across bay from Mobile, AL
    Posts
    661
    OK for a quick update on the 38-55 saga. I got the barrel today, got it blued and it looks pretty good. I screwed barrel into action. Boy did that have to be TIGHT!!! to index properly. By laying a 12" ruler across the sight dovetail, then another across the action flat on top, it was pretty easy to tell when index was correct. Got the barrel screwed in, but still have to finish up with magazine and misc stuff, but just can't wait to fire something.

    I loaded up a 30-30 brass with 5 grains Bullseye, put some filler to fill space, then plugged end with beeswax. Shot and it fireformed nicely. Looks just right and would work just fine. It is about .055" too short for the 2.082" 38-55 brass I ordered. I'm sure ya'll remember there are two different lengths, 2.082" and a 2.125" length brass. Take your pick - either works in long chamber. JES says he recommends the 2.082" so that's what I ordered when I ordered new Starline brass. Looks like I could have got by with fire forming the old 30-30 brass, but didn't wish to take a chance. 50 new brass with correct headstamp only cost $30 shipped so I decided to get new brass, but did want to try fireforming.

    Now to finish rifle and load some shells.

    Ken H>

  6. #26
    Boolit Master Texas by God's Avatar
    Join Date
    Mar 2016
    Location
    Texas
    Posts
    4,492
    That sounds great, post it up when it's lined out!

    Sent from my SAMSUNG-SM-G930A using Tapatalk

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check