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Shooting & Reloading - Mausers, Big Bores and others >> Big Bore Rifles
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GreenjoyTJ
.224 member


Reged: 04/05/03
Posts: 28
Loc: Pickering, Ontario, Canada
Concerned about M70 bolt ware
      #49208 - 05/02/06 12:08 PM

I have a year old Winchester M70 Safari Express in 375H&H.
During my second cleaning of the rifle after it's first shooting session.
I noticed the lower portion of the right locking lug, the part the forms the lower side of the anti bind slot was broken clean off. Just a small rectanglular stump about about half a milimeter high was left were the small blade like portion of metal that formed the lower wall of the anti bind slot.

The rifle was returned for repair to the local authorized Winchester repair gunsmith in early July 2005.
A new bolt was orderd. I was advised this repair will take months just to get the part from Browning of Montreal (who orders the part from USRA).
The rifle was return to me mid December 2005.
The bolt was replaced under warranty.

Now it appears thats a new problem may be occuring.

While cleaning the bolt the other day I noticed what the cocking cam surface on the back edge of the bolt sleeve was get scored up by the cocking piece.
When the bolt handle is raised the cocking piece is force up a sloping cam surface maching onto the rear edge of the bolt. This cocking surface looks
like a Nike swoosh that been cut into the rear edge of the bolt sleeve.

As this is the first M70 I have ever owned and my first high power bolt action rifle.
So I don't know how much scoring or ware is supposed to occur at this point. The two parts that rub together here, the cocking piece and the bolt
sleeve, I did not expect to see a big deep groove plowed into the camming surface of the bolt sleeve.
Maybe this bolt wasn't tempered correctly or the cocking piece is tempered too hard.
Or maybe this is normal ware until these to parts ware in and burish polish each other.
Theses parts were oiled but I have now put a blob of high pressure grease on them. I hope this will reduce the scoring ware.

I noticed if the safety is in the middle position the bolt handle lifts much easier than if the safety is in the full foreward fire position. Is this normal?

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500grains
.416 member


Reged: 16/02/04
Posts: 4732
Loc: Salt Lake City, Utah USA
Re: Concerned about M70 bolt ware [Re: GreenjoyTJ]
      #49497 - 08/02/06 09:58 AM

It has been said repeatedly on the internet (and therefore may be true ) that Winchester's quality has gone downhill, and your experience would seem to bear this out. I would not fire the rifle any more and get it to a gunsmith for evaluation. Sorry I cannot be more specific than that.

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DarylS
.700 member


Reged: 10/08/05
Posts: 27508
Loc: Beautiful British Columbia, Ca...
Re: Concerned about M70 bolt ware [Re: GreenjoyTJ]
      #49553 - 09/02/06 05:46 AM

I concure with 500 grains. Get it checked out by a Competent guns smith.
: It sounds as if you have a couple probems, but without seening the bolt, it is difficult to access.
: Generally, if there is galling on the cocking surfaces, lifting the bolt knob to cock the bolt (from fired position) will be bery difficult.
: These surfaces shouldn't be dry to start with, but also shouldn't gall. If there is a groove galled into the ramp surface, it sounds as if there is a flash chip on the other surface which is doing the cutting and that shouldn't be there.
: The safety in the middle position is the 'operating while cocked' location as it disengages the cocking surfaces. I didn't think the safety would go to that position if the bolt wasn't cocked. It's been a long time since I had a m70. Once cocked,the bolt's operation should be quite easy as well.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

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luv2safari
.400 member


Reged: 09/11/03
Posts: 1412
Loc: United States
Re: Concerned about M70 bolt ware [Re: DarylS]
      #49600 - 09/02/06 04:25 PM

I would return the rifle to Winchester for an exchange or refund. I had terrible experience with the Safari Express rifles I bought...3 of them... Try to find a stainless model; they seemed much better.

--------------------
Hunt with Class and Classics

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