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First of all, reloading is a difficult and dangerous activity, to be done only by law recognized experts meeting legal requirements.

All responsibility lies with who decides to reload these ammunitions.

It is impossible for us to know the conditions of your gun, of the bullet case, the competence of the person who’s reloading, nor any other variable at the moment of reloading. This is why we decline every responsibility for any damage or problem due to a wrong reloading processAll responsibility lies with who decides to reload these ammunitions..

We will only advise you about the right powder to be used, but it’s up to you to find the right dosage. Ours is only a piece of advice, you may want to try other possible combinations.

Please chose your dosages carefully and gradually and watch out for any sign of overpressure.


Please remember: always be careful and chose the powder dosage gradually, paying attention to any sign of overpressure. When temperature leaps occur, huge changes in exercise pressure (especially in monobasic powders) may take place. It is crucial to know the exact land diameter of the bore to avoid accidents during the reloading process. Reloading is a dangerous task, to be done only by experts who are aware of all the variables we’ve just ran over.


Haslerbullets is on QuickLOAD, the world leader ballistic prediction software. . To download the Hasler ogive file Click here. Please note that the file is compressed in ZIP format You need to decompress it before using it with QuickLOAD. If you haven’t installed an application to decompress it, you can get one for free clicking here.



Hasler bullets may have two O-rings and one Pilot O-ring, or three O-rings and one Pilot O-ring.

The Pilot O-ring has a different form and it is at the edge of the bullet, its function is to make the insertion of the ball into the barrel the more coaxial as possible, in order to gain the highest precision.

During the assembling process, it is crucial that at least two o-rings are kept inside the neck (see explanatory image).

The neck must be re-calibrated for at least 2/3 of its length; if you re-calibrate it for its whole lenght it is even better.

The neck must offer sufficient strength to firmly retain the ogive. For ogives long as the 30/168/Ariete and 7/152 Ariete someone makes a slight crimping with “Factory Crimp Lee”, in some cases to improve the combustion, and for holding firmly the ogive gauges with short necks (300win.Mag., 7 Rem. May etc. …). With semi-automatic, it is desirable to do a light crimping or a narrower calibration of the neck.

If you are using dies with the bushing, you have to position them so that there is still enough room for the o-rings inside the neck.

Freeboring: this parameter is crucial for shooting precision, usually in almost every caliber you reach a freeboring between 1 and 2mm. You’ll obtain maximum precision inside this range. It is possible to modify the distance between the two O-rings, as long as they stay inside the collet.

Hasler ogives offer low bore fiction and, as a consequence, lower counter-pressure. That’s why they’ll require a little more lively powders to reach the right pressure needed for the perfect combustion of the powder itself.

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