Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
My 338 Sherman / Ruger M77 Build
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="RedSnake" data-source="post: 1691604" data-attributes="member: 102245"><p>I breathed some new life into a 1980s tang safety Ruger M77 originally chambered in .270 Win. and had it rebarrelled to a 338 Sherman. </p><p></p><p><img src="https://isolunar.files.wordpress.com/2019/08/7a75888e-d8b5-49dc-a683-0ec6e0f02b38.jpeg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>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. </p><p></p><p><img src="https://isolunar.files.wordpress.com/2019/08/0b93ded5-e180-413f-8df1-6fb10a648e07.jpeg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>Build Specifics </p><ul> <li data-xf-list-type="ul">Action: Ruger M77 tang safety</li> <li data-xf-list-type="ul">Caliber: 338 Sherman (LA)</li> <li data-xf-list-type="ul">Original wood stock (refinished)</li> <li data-xf-list-type="ul">Pillar and full length bedded</li> <li data-xf-list-type="ul">Benchmark light palma 1:9.4 finished at 24"</li> <li data-xf-list-type="ul">APA Little Bastard brake</li> <li data-xf-list-type="ul">Factory trigger reworked </li> <li data-xf-list-type="ul">Cerakote midnight blue</li> <li data-xf-list-type="ul">Leupold 34mm rings</li> <li data-xf-list-type="ul">NF ATACR 4-16</li> </ul><p>Accuracy from fire forming loads was surprising accurate using mid range 338-06 loads and Hornady 250 hpbts over Varget. </p><p></p><p><img src="https://isolunar.files.wordpress.com/2019/08/b08c538d-9378-434c-aef1-470f88085504.jpeg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>I plan on loading Rocky Mountain 250gr ULDs. Wanting a more temp stable powder I thought I'd try R-16 and Varget. Prelim load dev using RL-16 had disappointing mv (mid 2600s) — couldn't pressure out before case capacity was at max even with a drop tube. </p><p></p><p>Switched to Varget and got mv of 2760 before signs of excess pressure with ejector swipe and sticky bolt lift. </p><p>* Rocky Mountain 250 gr </p><p>* Norma Brass formed from 338-06 A2</p><p>* Fed GM215M</p><p>* OAL of 3.530" (.005 jump)</p><p></p><p><img src="https://isolunar.files.wordpress.com/2019/08/91dd8d20-c2a4-4e63-9628-562e2333b78b.jpeg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>Hoping to get back to range to finalize loads in next couple of weeks.</p></blockquote><p></p>
[QUOTE="RedSnake, post: 1691604, member: 102245"] I breathed some new life into a 1980s tang safety Ruger M77 originally chambered in .270 Win. and had it rebarrelled to a 338 Sherman. [IMG]https://isolunar.files.wordpress.com/2019/08/7a75888e-d8b5-49dc-a683-0ec6e0f02b38.jpeg[/IMG] 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. [IMG]https://isolunar.files.wordpress.com/2019/08/0b93ded5-e180-413f-8df1-6fb10a648e07.jpeg[/IMG] Build Specifics [LIST] [*]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 [/LIST] Accuracy from fire forming loads was surprising accurate using mid range 338-06 loads and Hornady 250 hpbts over Varget. [IMG]https://isolunar.files.wordpress.com/2019/08/b08c538d-9378-434c-aef1-470f88085504.jpeg[/IMG] I plan on loading Rocky Mountain 250gr ULDs. Wanting a more temp stable powder I thought I’d try R-16 and Varget. Prelim load dev using RL-16 had disappointing mv (mid 2600s) — couldn’t pressure out before case capacity was at max even with a drop tube. Switched to Varget and got mv of 2760 before signs of excess pressure with ejector swipe and sticky bolt lift. * Rocky Mountain 250 gr * Norma Brass formed from 338-06 A2 * Fed GM215M * OAL of 3.530” (.005 jump) [IMG]https://isolunar.files.wordpress.com/2019/08/91dd8d20-c2a4-4e63-9628-562e2333b78b.jpeg[/IMG] Hoping to get back to range to finalize loads in next couple of weeks. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
My 338 Sherman / Ruger M77 Build
Top