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Military Firearm Restoration Corner

Reciever Setback Question


8uck5nort

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I have seen reference to something called reciever setback. From what little I understand

this is a bad thing?

 

What is it exctly and is there any signs you can look for when inspecting a rifle for purchase at a pawn shop/gun show?

 

I have seen the Spanish Mauser and this particular issue mentioned in the some earlier posts. I am currenlty working on a LaCoruna 1951 mauser and sporterizing it or trying to anyway. :rolleyes: I was getting ready to purchase a new trigger, follower, stock, extended plate release, glass bedding kit and a drop in scouting scope mount for it. Before I drop about what I paid for the rifle in upgrade parts is there a quick and dirty test to see if I need to be concerned?

 

On another note I attended the Indy 1500 gun show last weekend and compared to the panic stampede from the show in March this one was pretty slow. I was looking for a 6.5mm Carcano, but not a single one. Ended up putting money towards reloading equipment. I picked up a used set of Hornady 8mm dies, your basic Lee breechloader kit equipment, a digital caliper and a pound of IMR powder. I just ordered the rest of the odds and ends I need from MidwayUSA and hope to have my first handload done and tested by end of this month. We'll see...

 

We (family) will be getting a new digital camera for upcoming trip to Texas so I hope to have some pix posted of progress soon.

 

Appreciate any feedback.

 

 

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Hoping that I can explain and that I am right. Setback is when the lug after firing "sink" into the receiver and there is a dent in the receiver lug area. Which mean that the receiver is some what no good. It need to be reheat treated. It will also creat an headspace issue. So it will be unsafe to fire.

 

Rob

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I have seen reference to something called reciever setback. From what little I understand

this is a bad thing?

 

What is it exctly and is there any signs you can look for when inspecting a rifle for purchase at a pawn shop/gun show?

 

 

Appreciate any feedback.

 

Yes it is a bad thing.

The usual cause is from repeated firing with excess head space.

The soft core of the receiver has been compressed under where the receiver lugs contact the bolt lugs.

The result of this is even greater excess head space.

It is really hard to detect with the barrel on.

IF YOUR LUCKY..... AND.....

you still have the same bolt you MIGHT be able to feel it.

With the bolt in the closed position open the bolt while applying rearward tension.

If you detect the bolt wanting to go forward as you rotate the handle up, do the following.

Place the rifle back where you found it, wish the seller a nice day and walk away.

 

Tinker :(

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Been there and done that with La Corona Mausers. Receiver set back is the ultimate doom and a very common problem with all Spanish military 98's. I suggest if you insist on using it to get the receiver heat treated and consider a bolt from another manufacture.

 

My understanding of the Spanish military 98's is the metallurgy is very inconsistent. To soft or to hard and brittle with very few showing up in between.

 

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