My 300ss (Sherman Short) Ruger M77

gator378

Well-Known Member
Joined
Apr 23, 2005
Messages
207
I finally got my 300ss up and running. I wanted to rebuild my old Ruger M77 (sentimental value). It was the first rifle I ever bought chambered in 7mm mag, and I killed 2 elk with it many many years ago. The Ruger internal box is tiny, like 3.4” which really limits what cartridges I could run. The 300ss was perfect!
My smith squared the entire action and bedded the original boat paddle stock, which I really wanted to keep.
It has a Bartlein barrel, 26” 10tw 3b contour.
Bare rifle weighs sub 7lbs. Launches Berger 215’s at 2870fps. During testing I got close to 3000fps but best accuracy was sub 2900fps.
As you can see it’s a TACK DRIVER!
1 hole groups at 100 yards.
Target looked like 1 minute of fly. Wish I could get to that point
 

frostop

Well-Known Member
Joined
Jan 10, 2010
Messages
279
Location
ID
Looks good! Next mod would be having your smith drill and tap the receiver so you can run a pic rail and normal rings. EGW makes a base for it, that requires drilling and tapping, but once done, you're good to go.

http://www.egwguns.com/scope-mounts...-must-drill-tap-receiver-20-moa-ambidextrous/

I've had M77 MKII's for over 20 years, and I've had plenty of issues with the proprietary rings. Plus, it really limits your options.

I'll second the EGW bases, I've tried that Wiegand base and just wasn't confident in it!
Had an EGW put on two rifles and running Warne rings!
 

Rhino Hunter

Well-Known Member
Joined
Jun 16, 2010
Messages
273
Location
S.E. MI, but my heart is in Da' UP
I finally got my 300ss up and running. I wanted to rebuild my old Ruger M77 (sentimental value). It was the first rifle I ever bought chambered in 7mm mag, and I killed 2 elk with it many many years ago. The Ruger internal box is tiny, like 3.4” which really limits what cartridges I could run. The 300ss was perfect!
My smith squared the entire action and bedded the original boat paddle stock, which I really wanted to keep.
It has a Bartlein barrel, 26” 10tw 3b contour.
Bare rifle weighs sub 7lbs. Launches Berger 215’s at 2870fps. During testing I got close to 3000fps but best accuracy was sub 2900fps.
As you can see it’s a TACK DRIVER!
1 hole groups at 100 yards.
Very nice results...both the gun, and the group!

When you said "old Ruger M77" I thought I'd see a tang safety and not the three position safety though. Either way, Ruger makes some very durable firearms.
 

Mainmechanic

Well-Known Member
Joined
Feb 24, 2019
Messages
65
Location
Pa
Noticed the work done to the inside of the forearm. Would you elaborate on what was done in that area please ?
 

odoylerules

Well-Known Member
Joined
Dec 6, 2016
Messages
527
Noticed the work done to the inside of the forearm. Would you elaborate on what was done in that area please ?
The boat paddle stock has a lot of flex near the forearm. Loading the bipod caused the stock to make contact with the barrel, even after inletting it a bit. My smith reinforced it with a super lightweight composite material used in aircraft. Added very little weight but made the stock very strong/stiff.
 

RedSnake

Active Member
Joined
Aug 11, 2017
Messages
27
Location
Dallas, Texas
Great looking build and what a tack driver!

I’m reviving my tang safety m77 — at gs getting barreled to 338 Sherman. Modified the bolt stop, fabbed an extended box and opened up back end of action action to allow OAL of 3.6.
 

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