MidSouth Shooters SupplyWidenersGraf & SonsRotoMetals2
RepackboxStainLess Steel MediaInline Fabrication

Results 1 to 10 of 10

Thread: 338 shooters??

  1. #1
    Boolit Buddy
    Fernando's Avatar
    Join Date
    Jan 2013
    Location
    North
    Posts
    213

    338 shooters??

    For those making 338 brass necking up or down.
    What are you losing or gaining in thickness?
    Thinking on a 338/06
    Measurements if you have them please.
    Parent case 25-06,270,280,06, Whelen
    Starting neck thickness/formed thickness
    Case length after initial size and after fireform.
    Any other measurements you might have noted.
    Notes from 338/08 would help if that was your project.
    Thanks much

  2. #2
    Boolit Master pmer's Avatar
    Join Date
    Feb 2011
    Location
    East Central Minn.
    Posts
    1,257
    Fernando, I have been enjoying the 338-06 since 1997. My rifle is built on a mauser and has a 24'' medium weight barrel, it has a Buehler style safety, Timney trigger and a Fajen stock.

    I only used 30-06 brass and 35 Whelen brass to form cases. A fired case neck from my rifle measures .369 and loaded cases measure .361. The case necks from either the 06 or Whelen brass are .012-.013 with some reaching .014. And that is from after forming. For me it seems easier to neck down the Whelen brass and I saw no significant difference in groups from either brass.

    I love this cartridge but haven't done any load development since 2004 because I found I can't beat a case full of 4064 and a Hornaday 200 grain Spire Point. Its getting 7-9 standard deviation at just over 2800 FPS and flirts with 1/2 MOA all the time.
    Recent cast boolit hunts:
    buck & doe, Accurate Molds 36-225AG Model 94AE
    Russian Boar Accurate Molds 46-405A Marlin 45-70
    doe 32 Win. Spl. 1920's Winchester model 1894 rifle

  3. #3
    Boolit Buddy
    Fernando's Avatar
    Join Date
    Jan 2013
    Location
    North
    Posts
    213
    Thanks - I'm putting together a shoulder buster.
    Peep sight northern deer 125yd rifle with peeps and old eyes.
    I wanna just hold on the shoulder and bust em.
    These are northern corn fed deer not southern deer that 140gr will zip through.
    Done with glass and want to hunt my remainder in my plaid red wool and peeps.
    Cast heavies 225-250 range 1800+/-fps
    .338/06 03A3 will be the weapon of choice.
    That and my 54 flinter Beck will see me to the end.
    I'm all done chasing new **** I'll let the kids play with the creedmore and whatever
    else the gun rags try to sell just to make a buck.
    I'm thinken 1-14" and good to go.
    Already planing a mould for Tom at accurate to turn out in brass 2 cav GC of course.

  4. #4
    Boolit Grand Master
    9.3X62AL's Avatar
    Join Date
    Mar 2005
    Location
    Redlands, NorKifornia
    Posts
    11,330
    Fernando--

    I like your outlook on hunting--much respect. I would select a design for the 225-250 grain bullet that you propose to use, and run it through the online Greenhill Formula twist rate calculator. You can input bullet length, caliber, velocity, and material (cast lead or jacketed lead), and see ahead of time if your proposed twist rate can support that bullet at the intended velocity. The Greenhill "default constant" (150) kind of assumes 1800 FPS, a variable that can change as start velocities are raised or lowered.
    I don't paint bullets. I like Black Rifle Coffee. Sacred cows are always fair game. California is to the United States what Syria is to Russia and North Korea is to China/South Korea/Japan--a Hermit Kingdom detached from the real world and led by delusional maniacs, an economic and social basket case sustained by "foreign" aid so as to not lose military bases.

  5. #5
    Boolit Master dh2's Avatar
    Join Date
    Mar 2014
    Location
    Ft.Bragg,NC
    Posts
    519
    I have been doing .338-06 since 2002 with very good results, I have not measured neck thickness I have formed some from 30-06 cases and get cracks in the cases after only a few firings, But I have a box that is formed from new R-P 35 Whelen brass been shooting it for 10 years and still going good.

  6. #6
    Boolit Buddy
    Fernando's Avatar
    Join Date
    Jan 2013
    Location
    North
    Posts
    213
    Thanks for the greenhill tip.
    Looks like 14 shows a tad fast for optimum but figure it will be best for my
    application - a little faster always seemed to work better in colder temps
    at least in 22 BR rifles ie.... 16 vs 17.
    I see most 34 bores are factory 10 and 12.
    But I have time to ponder this build 14,15 & 16 Hmmmmm?

  7. #7
    Boolit Master
    Chill Wills's Avatar
    Join Date
    Oct 2011
    Location
    Colorado
    Posts
    1,981
    The 338-06 was my first wildcat love and built a elk rifle in 1979 on a Mark X action. I used a 12 twist and first shot the RCBS bullet made for the 33 Winchester. It cast 215grains and was fine for mule deer but for elk I thought I needed a 250grain and had a Hoch nose pour mold made. That was a good choice and it worked well.

    I have no idea if a 14 twist 338 would be better for cast and your needs but you can always try it. It may in fact work best with cast bullets under 250 grain for the distances you describe.

    I always just used the plentiful 30-06 brass to form 338's but later found out with a bunch of Win 270 range finds that they make up into great 338-06 brass. Just neck up in stages and trim to correct length. I learned this making brass for my 35 Whelen necking them up to 338 along the way.

    Good luck with your rifle.
    Chill Wills

  8. #8
    Boolit Master pmer's Avatar
    Join Date
    Feb 2011
    Location
    East Central Minn.
    Posts
    1,257
    Fernando
    Are you going to have the O3-A3 rebored? Just wondering because I have a Bubba'd Remington O3-A3 that I often pondered what to do with. It still shoots okay but the bore is pretty far gone. It has a Williams rear sight and the stock was chopped off ahead of the front swivel. The stock on mine has that short stub for a grip, not the prettiest thing to look at but it points and shoulders like a dream.

    I'd go with a slower twist as well especially if you ever wanted to step up the velocity shooting cast. My 1-16 twist .32 Win. Special can go over 2200 fps with hunting alloys and without any special tricks.
    Last edited by pmer; 12-08-2018 at 10:25 AM.
    Recent cast boolit hunts:
    buck & doe, Accurate Molds 36-225AG Model 94AE
    Russian Boar Accurate Molds 46-405A Marlin 45-70
    doe 32 Win. Spl. 1920's Winchester model 1894 rifle

  9. #9
    Boolit Buddy
    Fernando's Avatar
    Join Date
    Jan 2013
    Location
    North
    Posts
    213
    Yes - It just came in yesterday and I have not had a chance to look at the bore yet.
    This one is a sporterized one to go with my greek return.
    This one was done by an upscale bubba - the action looks fresh and the stock is some
    nice straight grain walnut white line spacers and everything also sporting a williams.
    Unless the bore is as nice or nicer than my 2 groove it will be the canidate.
    If by some stroke of bad luck the bore is pristine I will wring it out with the
    usual suspects 299,284 and a new old 290 that I'm guessin has never seen lead.
    If it shoots I will either find another or go with a rem 721 which was my second choice.
    Kind feel weird as I've never wished for a bore to be bad before.
    I have to hurry on this a little because I've started doubting and thinkin whelen but
    I have lusted after the 338 since I was young and reading elmers stuff.
    14" 338 or 16" whelen unless JES recommends something else.

  10. #10
    Boolit Buddy
    Join Date
    Apr 2009
    Location
    S.E. Iowa
    Posts
    105
    Elmer made me do it. I had JES bore out a Ruger No.1V in .22/250 to .338-06. I can't remember if it is 14" or 15" on the twist. I mostly just use .30/06 donor brass.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	DSC_0142.jpg 
Views:	7 
Size:	85.6 KB 
ID:	231771  
    Good judgment comes from experience.
    Experience comes from poor judgment.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
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