Sturm, Ruger manufactured M77 bolt
action rifles from 1968 to 1991. The trigger
overtravel adjustment set screw
(shown on right) in a few of these rifles
may not be securely tightened and may
move too readily. This change in original
adjustment can, in extreme cases, either
cause the rifle to fire unexpectedly (with
the safety "off) or cause the rifle to not
fire at all. This may occur suddenly and
Ruger M77 bolt action rifles produced
in later years have this set screw
permanently secured. These rifles have a "T" inscribed on the underside of
the bolt handle. This condition cannot occur in any of our other firearms as
their trigger mechanisms differ. Please note in particular that this condition
cannot occur in Ruger M77 Mark II bolt action rifles, which are of an entirely
For your safety, we ask that all owners of M77 rifles (except those with a
"T" underneath the bolt handle) contact us, using the coupon below.
You will receive a new locking screw that will replace your present overtravel
adjustment set screw and detailed instructions for quick, easy installation.
There is no charge for this service and replacing the screw will have
no adverse effect on trigger pull.
Do not use your M77 rifle until you have received and installed the replacement screw
OK, I just joined this forum and I also have a M77 in a .30/.06. Mine is a light weight version (6#'s?), and the first shot or two are good, but if I take too many shots, the barrel gets real hot and the pattern drifts. I use a Nikon scope 3x-9x 40mm.
I shoot a stock gun with no modifications. At one time I was thinking of doing the bedding to improve the accuracy, and after reading these posts, I wonder if a new trigger might help too. My biggest concern is doing all of this, and having the same problem because of the thin barrel. I bought the gun in 1987, and from what I can tell is I do have the recall because of the T under the bolt.
I know shooting a better ammo than Remington Core Loc 150's whould also help, but I think my varability is due to the barrel heating up. I also use a small bipod on sight in days.
I've taken a lot of deer with this gun, but missed 2 this year, and that's not like me.
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