Just got back from Sunday Island where my 15 year old son did his introduction for the junior hog deer hunt. Included in this is a shooting test which has to be passed for the junior to go on the hunt.
Tom was using his Ruger MkII 77 in 30.06 with PMC factory ammunition, 150gn.
His group at 50 yards was all 3 bullets touching , despite his first 2 shots being misfires ! At Little River 2 weeks ago we had 7 misfires out of a packet of 20.
The Ruger is obviously very good , but has anyone had misfires with Pmc factory rounds ?
Mark

Mark,
I've gone through 300 rounds of .223 and 200 of .270 without a misfire. Had the odd pack of .303B as well without any probs.

May be a dud batch??? Have you had any other brands misfire?

Feral_Goz

It may be the ammo but out of curiousity was the other 7 misfires with the same rifle? If not that may point to the ammo.

If its the same rifle I would be having headspace etc checked - maybe the firing pin is not hitting the primer hard enough all the time.

I'm with MLG on this one unless the ammo was real old

I read somewhere their primers were made in Russia, which may have a bit to do with it.

The ammunition is new , only a few months old . I did test one of the misfires in my rifle with no joy. Conversley with my handloads there was'nt a single misfire. The great pity is the combination of Toms' Ruger and PMC is very accurate.
If he is successful in April I'll post photos.
Mark

Had a mate with similar problems in his Ruger 270 . Changed ammo makers and the problem went away....

Rugers have commonly had weak firing pin springs.

In fact many years ago the gunsmith the late Don Black use to keep springs for then when he was selling quite a few.

It makes them feel smoother to work the action in the gun shop.

Mike

Someting I meant to add.

The rifle can be right on the threshold. I had one of the Ruger 375 Express rifles when they first came out and when I chronographed Winchester factory 270 grain Power Point ammo it was only doing 2450. It has always done just over 2600.

Don Black put another spring in and the velocity was up at normal. That has always puzzled me because as I have seen similar before and you would think the primer would either go off or not go off and velocity would be the same.

But obviously that rifle would have has some misfired with a harder batch of primers etc.

Mike

I had misfires with my Ruger 35 Whelen, but my gunsmith installed a heavy-duty firing pin spring and they stopped. I've also had good luck with 308 red-box PMC ammo loaded in the US. I doubt it's the ammo unless you've get surplus PMC, or ammo that was loaded in Korea. Hope this helps, Okie John.

I also had misfires with a Ruger 77, a 25-06... It did not begin until after about 200 rounds, at which time it started misfiring every few shots, with both handloads and some factory loads that I bought just to check it.. I took it to a gunsmith and had a heavier firing pin spring installed and it never misfired again...

Anew mainspring may be the go.
Mark

Had the same problem with my m77 in 30/06, pmc ammo also and then on my handloads. I got rid of it and got a vanguard, have not looked back.

cheers cc

I have used a lot of 30/30 pmc ammo in the past in a m94 and never had any problems.

I've used PMC 22-250rem ammo in a Winchester and Ruger and had no problems!

I have never used PMC ammo in any of my Rugers and have never had a problem with misfires!