Hello to all ! This is a great Forum and my first Post is about the E-Mail from Sako/Tikka dealing with the Headspace/ Freebore in the T3 .300WSM.
They needed only about 2 hours to answer my E-Mail. Even if someone doesent like the words, i was very impressed by the speed of the response! By the way, i live in Canada BC!
"Rumors are rumors.We are building our rifles according to the specs of C.I.P. that should be the same as the Saami ,as the
cartridge is an American development.These guns are working and they do shoot accurately.Naturally, shooting a factory load will expand the case to the individual dimensions of the rifle, that you , as a reloader should maintain, by only neck sizing the cases.
This way it is possible to go one step further that any factory to achieve the very best results as far as accuracy is conserned.
If someone means with the extra 0,2 mm, that we are using a short throat or "lead" as in other mag cartridges , that is what we do, but this has nothing to do with head space.Fa. Clymer is making 2 kinds of chamber reamers: the original "funnel throat" which
is more critical for reloaders than the normal type. This is why we use the latter. There is no effect on the performance or accuracy.
Best regards"
Pentti.Louhisola@sako.fi
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Lähettäjä: ** Export_Info **
Lähetetty: 19. huhtikuuta 2004 8:30
Vastaanottaja: Pentti Louhisola
Aihe: VL: Excessive Headspace
After digging a bit deeper they responded again!
Well! These rifle models that we build, are not Bench Rest rifles.The speculation with a too long throat is therefore unnessesary.
The accuracy is there! Can you show us results from any other manufacturer , that their standard production hunting rifle
is more accurate?As you are a reloader, you should know. With good bullets and a proper load these rifles will shoot well
under 1 MOA, In practice this means, that you can make a deadly shot at a deer or similar size game animal to over 500
yards distance. This in turn means, that the hunting result does not depend on the rifle mainly, but other factors contributing
to much larger errors in long range shooting.We are making these rifles to serve the hunter as a reliable tool for years, normally they will endure the life of a hunter and more..
Furthermore about the discussions in the net: Much of the inaccurate chat is done by persons who do not exactly know
what they are talking about. Headspace in the WSM cartridges is defined as a certain distance from the shoulder surface
of the case to the bolt face.This is important for the safety and function of the rifle. The tolerances in headspace are small, but in principle, the largest cartridge must fit into a minimum chamber and on the other hand the smallest cartridge must be safe to fire
in the maximum chamber.
The lead or throat after the chamber is a totally different thing, and has nothing to do with the headspace .
There are several forms and measures of the rifling after the throat, and these are very often characteristic to the manufacturer.
In many calibers, the bullet seated according to factory (cartridge makers) specification is always short of touching the
rifling. Then , in many rifles, the cartridges also can be loaded a bit longer, and still they can be fed from the magazine.
Then there are others, where this is not possible.
To feed properly from a magazine, cartridges that are fat and relatively short like the WSM cartridges, the magazine measurements
are critical. If there is too much space lengthwise, the will be feeding difficulties and damaged bullet tips because cartridges move in
magazine due to the recoil from previous firings.
I have many hunting rifles muself.I am a very keen and experienced reloader.I have made extensive firing and loading tests
in most of mu rifles.You are talking about loosing velocity because of freebore. This is not the case, change to a diffrent powder and primer combination and measure the velocities. You will notice, that the loss of velocity is of no importance at all.More contributing
factors to the velocity are: Correct type of powder and primer, barrel legth,internal measurements and surface quality of the barrels
and naturally the material and the construction of the bullet.
Reloading is interesting. To get good results a good rifle with a good barrel and sound contruction is essencial. Sako makes such
rifles: both Tikka and Sako rifles belong to the very best in the world, when production rifles are concerned.
Best regards
Pentti.Louhisola@sako.fi
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