no4 sporter butt fitment

[xa-coupe]

Today I took the no4 7.62 out with some chinese factory ammo that has served me well in the past. Same thing as my handloads.. shoots a nice tight group of 3 or so and then starts stringing vertically.
During cleaning I noted that there was movement somewhere in the butt. After a while I found it roatated slightly, no other movement. There is also a gap on one side of where the butt goes into the socket and not the other.


When I got home I took the butt off and the started to look at why it was moving. My first thought was that I didn't do it up tight enough... it was tight .. very tight. So I took it off and then pushed the butt into the socket and it fitted fine.... fine until I did it up and then the gap appeared and it rotated.

The butt is a sportco effort so it should be as good as it gets for a mass production butt.



Where do I go from here?
I wonder if the hole the butt screw goes into is straight. In the 5 minutes I spent with it's donor rifle it seemed to fit ok, there was certainly no movement.
I thought about trying to pack it out but if it fits okay without doing the butt screw up I don't know how this will help.

Any ideas? I really don't want to put the original back on as this fits me a lot better and works a lot better with the scope.

Information

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[Baal]

Others who actually know what they're talking about will chime in later. But first, have you used this rifle before with the original butt stock and not had this problem?

From what I understand, a loose butt stock will result in horizontal stringing, not vertical. Since your fore stock is cut down the barrel might not have the needed support, which will result in vertical stringing.

Anyways, knowledgeable guys will be by in a bit.... How's the weather?

[xa-coupe]

Hi Baal,
I did use the rifle with the original butt though I didn't really get serious about trying it out. The original butt fits fine so it's definitely something to do with this one but I am not sure what. The barrel is free floating, I assume that this was all done when it was a target rifle. It is not a cut down milsurp stock, there are no markings what so ever on it.

The weather is okay, we are heading into summer so it's warmish and humid .. once summer arrives it'll bloody hot but dry. I like cold weather, but not so fond of how cold it gets up there

[Bearclaw]

XA-Coupe, me want XC coupe.
So I presume you are in OZ. I have a sportco and Parker Hale wood set if you are looking for a replacement set a replacment set.
Myles

[xa-coupe]

Hi Myles .. ADR 27A makes the XC a lumbering brute which uses amazing amounts of petrol !

I'll see how I go for sorting this out before resorting to buying things but thanks for letting me know, I'll certainly keep it in mind. Perhaps you can PM me some pics of the wood? Never know what else may crop up !

[Peter Laidler]

I can see the problem straight away.................... Butts are manufactured with the male part of the butt socket very slightly tapered and yours ain't! The result is that while on a normal military type butt, the tapered part of the butt tightens up in the socket as the stock bolt it tightened, yours isn't, so it can't tighten up. Simple as that. So as soon as the front part bottoms out, that's as far as it goes and if it's loose, it stays loose!

Some later No8 rifles had the same problem. Next question....................

[tbonesmith]

You could just follow any glass bedding instructions but with the butt to the butt socket instead of the action to the wood. I've done this on one of 2 rifles and it worked perfectly. If it were an original military rifle I'd patch the tennon in timber and re fit it, but with a sporter/target rifle the epoxy filler/bedding compound would work fine and be easy and quick.

[Bearclaw]

No cost you pay the postage or if your in brissy come pick them up.

[Bearclaw]

I will try to take a photo of the sportco.

[Nickjc]

I can see the problem straight away.................... Butts are manufactured with the male part of the butt socket very slightly tapered and yours ain't! The result is that while on a normal military type butt, the tapered part of the butt tightens up in the socket as the stock bolt it tightened, yours isn't, so it can't tighten up. Simple as that. So as soon as the front part bottoms out, that's as far as it goes and if it's loose, it stays loose!

Some later No8 rifles had the same problem. Next question....................

Hi Peter.

Is it possible to indicate where it should be tapered?

The n1m3* 48 GRI I have has a slight space in the same area. I am wondering if the butt fitment can be corrected

thanks for the info!