4T wood clearence.

[read6737]

When H&H did there magic on the 4 to tune itin to the 4T.
How much of the cannon was free floating?
and roughly how much was the travel in the wood at the fore end?
After how many fairly rapid shots did the cannon go of zero because of the heat?

Information

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[Peter Laidler]

The barrel was not free floating. It had a muzzle bearing
Snipers do not do rapid fire so the question is unnecessary as the rifle was never subject to this treatment. If they needed rapid fire they would use a sub machine gun

[read6737]

The questions were ones the armourer was asking me.
He has no experiance with the No 4 T, but is a good armourer.
So then, only the front of the wood touches where the cannon exits and the rest does not ?????????
or what.
Re cannons heating up,
If you shoot a Steyr scout, after 3/4 rounds in about as many min then the point of aim goes offf a bit. But then it is only a scout sniper.
So the question is relivent as the compertitions I wish to shoot is
25 rounds at 200 meters
5 rounds in 5 min.
followed by 10 rounds in 10 min.
followed by 10 rounds in 5 min.
all 3 parts shot with a 2/3 min intervals.

[Ridolpho]

read6737: If you look in technical articles in the Knowledge Library, go to bottom pg 2, rifle manuals, maintenance. There is a description of the standard bedding in this Canadian government publication. In particular, note the description of bedding under the barrel reinforce. I prefer the slightly more detailed discussion in the 1955 version of the "Canadian Army EMER Manual". Copies of these can be found on e-bay. Regards.

Ridolpho

[RobD]

read6737, as I understand it, (Peter Laidler wrote the book on this), H&H did no "magic on the 4 to tune it in". H&H were sent rifles which were specifically selected because they shot exceptionally good groups. Thus these rifles were correctly bedded when issued, and the bedding was "as issued" - and not changed. In fact, the fore-stock was then numbered to the rifle, so there would be no accidental change to the matching of wood to metal.

[read6737]

Thanks for the info Rob D it is just the precice to the point reply I was looking for.
Would I be right in thinking that the mussel bearing was the only place the cannon was suported?
or was there a point roughly mid way along the cannon as well?
with out taking the wood off it sounds that my Longbranch just toiches in the center when the cannon is lifted up and down.

[Peter Laidler]

I think that you ought to read the article about fitting the fore-end read. The barrel acts just like a tuning fork the instance the round is detonated and the only support required is for 2" at the nocks form/reinforce and 2" at the muzzle which is a controlled damper. There was also a student test to show the efficacy and efficiency of this but I won't go into all that again as it's all been written down before. There are experts who have their own ideas about what is required to bed a No4T barrel but, like I have said many times, during post war tests and trials to evaluate exactly what bedding method gave the best and most consistent accuracy, the standard specification came out on top - bar none.

[read6737]

Thanks Peter.
I do not want to change the bedding, just realy understand it,
Dont want to b****r up the wood work eather.

[Peter Laidler]

To REALLY and truly understand what happens to the barrel when the bullet is thundering its way down the bore - and I only understand the very basics - then they say that you need a degree in music. And that's JUST to understand the harmonics or tuning fork part of the barrel.

But like I said. There were a few simple almost school boy O level physics lessons that illustrate several of the points.

[read6737]

I strangely I understood the harmonics. It made great sence and was a light bulb moment.
But it lead me to question of support in the center as I know that is also dependent on length for frequance of vibration.
( ie kids at school twanging the ruler on the desk and moving it quickly over the edge to get a diffrent sound, (frequence of movement))
My knowledge on enfirld rifles is basic,
My head is swamped at the moment with modern rifles as I am getting a modern T3 sniper rifle,
the same one the French Gendarmes use.
So old school is a headace.
Some times people just need simple answers.