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My latest build - 338 Sherman / Ruger M77

Posted By: RedSnake

My latest build - 338 Sherman / Ruger M77 - 08/14/19 03:41 AM

Well I drew a Wyoming Bull Elk tag for Oct rifle season. Thought it’d be cool to shoot my first elk with the rifle I shot my first WT with. So I decided to breathe some new life into my 1980s tang safety Ruger M77 originally chambered in .270 Win. and had it rebarrelled to a 338 Sherman.

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Build Specifics
* Action: Ruger M77 tang safety
* Caliber: 338 Sherman (LA)
* Original wood stock (refinished)
* Pillar and full length bedded
* Benchmark light palma 1:9.4 finished at 24”
* APA Little Bastard brake
* Factory trigger reworked
* Cerakote midnight blue
* Leupold 34mm rings
* NF ATACR 4-16

For those not familiar with this round, Rich Sherman based his design for the 338 Sherman using the .270 Win as the parent case and pushed the shoulder forward and blown out to 40 degrees. This yields a H20 case capacity between 76-79 gr depending on brand of brass. Compare this to 68 gr for the 338-06, 70-72 gr for 338-06AI, and 86 gr for 338 WM.

270 brass necked up to 338 (left) and fully formed 338 Sherman (right)
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Fire forming loads with Hornady 250 gr HPBT over a middle of the road 338-06 charge of Varget shot remarkably well.
I’m still working up loads using the Rocky Mountain 250 gr ULD and Varget. Initial testing maxed out at mv of 2760 before I got signs of excessive pressure. Folks have been pushing the 338 Berger 250 gr over 2800fps with RL-17.

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One of the drawbacks of the ruger action is the limitations it puts on OAL due to the short (3.40”) mag well. To allow a longer OAL to feed, I lengthened my action posteriorly with a Wyatt’s cut (which included milling away the center floor plate screw). I fabricated an extended mag box from two factory boxes spliced/welded together. The bolt stop was moved posteriorly about 0.25” by tapping/drilling a new retaining screw hole and the window for the stop was enlarged. I am now able to feed rounds up to 3.600.

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Refinishing the stock took me months. ... stripped the crappy 30 year old chipped poly coat, sanded, stained old school way with Alkanet oil and then hand-rubbed a million and a half coats of finishing oil comprised of Boiled Linseed Oil, Carnuba Wax, Turpentine, and Venetian Turpentine. One final top coat of diluted TruOil for durability. Leather wrapped recoil pad and Dakota arms grip cap inlaid with English cow horn to spice it up a bit.

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Posted By: BigPig

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 04:10 AM

Bert nice refresh on a classic rifle with tons of memories
Posted By: cblackall

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 04:29 AM

That is really cool. Thanks for the detailed write up. Good luck in Wyoming!
Posted By: mikei

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 11:11 AM

Very nice work and I, too, appreciate the detailed write-up. Hope you get yourself a world-class elk in October.
Posted By: Pitchfork Predator

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 11:22 AM

Very cool, well done. cheers
Posted By: Teal28

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 11:30 AM

That' Badazz. Very good looking gun. great write up and pics. Well done. up
Posted By: FiremanJG

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 11:39 AM

You sure did put in the work!

Congrats!
Posted By: bigjoe8565

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 01:11 PM

Great looking gun.
Posted By: Tactical Cowboy

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 01:11 PM

Very nice!
Posted By: ChadTRG42

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 01:12 PM

Very nice!!! Very cool round, also!
Posted By: Korean Redneck

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 01:13 PM

Cool story bro. I love home tinkering. Nice work, especially the part where u made the action longer.
Posted By: Big Fitz

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 01:24 PM

That is a gorgeous rifle! Good luck on the hunt.
Posted By: DStroud

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 01:28 PM

Turned out really nice! I have the same .270 Ruger with a pretty decent piece of wood on it that still gets a deer here and there just for old time sake.

Good Luck on Elk.
Posted By: ETexas Hunter

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 01:38 PM

cheers
Posted By: landsurveyor

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 06:07 PM

Originally Posted by Big Fitz
That is a gorgeous rifle! Good luck on the hunt.
Posted By: 2Beez

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 06:08 PM

Originally Posted by Pitchfork Predator
Very cool, well done. cheers
Posted By: Son of a Blitch

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 06:28 PM

Really cool write up! Thanks for sharing!
Posted By: redchevy

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 06:43 PM

Really like the look of it.

Choice of chambering is interesting as well. I keep telling my wife she is going to hate the day I retire if I live that long lol. Looks fun as hell but no way I would ever have the time to commit to it now.
Posted By: RedSnake

Re: My latest build - 338 Sherman / Ruger M77 - 08/14/19 08:54 PM

Originally Posted by Korean Redneck
... I love home tinkering...


My gunsmith HATES it when I tinker. LMAO. Especially when it involves 2 part epoxy (still so sorry about to that, bud) He’s got me on a no-buy watchlist at every store in north Texas
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