adjusting Steyr LP10 velocity screw

[Negrin]

I adjusted my LP10 velocity screw down to the point of "puff" sound, but still punching holes roundly. At that level, sound is a very pleasant puff, and pellet not tumbling as to tear paper.

That is 4 1/2 turns counterclock wise from completely closed position.

I don't have a chronograph. So what might be my feet/sec velocity?

Also, if I close my velocity screw completely back up, what would that velocity be?

Steyr web site mentioned LP10 velocity is 530 feet/sec. Is that the speed with velocity completely closed? or preset at certain screw turn, off tight position? In other word, can the speed go slightly higher than 530?

[Negrin]

Another question.

Does the velocity screw "C" screw holder have to have C slit in the 12 o'clock or 6 o'clock position, for it to be able to be tighten by the screw #20 from the side?

I don't understand this. The C screw holder has a circumferential groove for the side screw. But why does it have to have the slit in 12 or 6 o'clock position?

Thanks.

[paw080]

Negrin, save your money and buy a chronograph, forget the speculation
and find the answers to your questions.

Tony G

[j-team]

Another question.

Does the velocity screw "C" screw holder have to have C slit in the 12 o'clock or 6 o'clock position, for it to be able to be tighten by the screw #20 from the side?

I don't understand this. The C screw holder has a circumferential groove for the side screw. But why does it have to have the slit in 12 or 6 o'clock position?

Thanks.

The locking screw has to push the locking ring at 90 degrees to the split otherwise it wouldn't close it. If the locking screw was lined up with the split it would actually spread the locking ring the opposite of what it's supposed to do.

[pbrejsa]

Negrin, shoot on the flat steel plate. Safe your eyes! (The turning of this screw is very critical & sensitive.)

the first picture - velocity 143 - 150 m/s (470 - 490 feet/sec) - on the left: testing 7,3 grains pellet, on the right: testing 8,4 grains pellet
http://www.sskpraha6.cz/foto/rozplac.jpg

see the second picture - the bottom line (the upper line is the same shots as like the first picture) - velocity 152 - 158 m/s (500 - 520 feet/sec) - it's optimal setting
http://www.sskpraha6.cz/foto/rozplac2.jpg

the third picture - velocity cca 167 m/s (550 feet/sec) - it's the recommended maximum (6,9 grains pellet only)
http://www.sskpraha6.cz/foto/rozplac3.jpg

Petr

[Denis]

Negrin, shoot on the flat steel plate. Safe your eyes! (The turning of this screw is very critical & sensitive.)

the first picture - velocity 143 - 150 m/s (470 - 490 feet/sec) - on the left: testing 7,3 grains pellet, on the right: testing 8,4 grains pellet
http://www.sskpraha6.cz/foto/rozplac.jpg

see the second picture - the bottom line (the upper line is the same shots as like the first picture) - velocity 152 - 158 m/s (500 - 520 feet/sec) - it's optimal setting
http://www.sskpraha6.cz/foto/rozplac2.jpg

the third picture - velocity cca 167 m/s (550 feet/sec) - it's the recommended maximum (6,9 grains pellet only)
http://www.sskpraha6.cz/foto/rozplac3.jpg

Petr

Very technical method.

I would opt for the chrono.

[jipe]

Steyr web site mentioned LP10 velocity is 530 feet/sec. Is that the speed with velocity completely closed? or preset at certain screw turn, off tight position? In other word, can the speed go slightly higher than 530?

First, velocity alone is meaningless. You must also give the pellet weight as the velocity change a lot with the pellet weight.

Yes, it is possible to go above and my LP10 was factory set with higher velocity for lightweight pellets:
- Vogel rifle match 0.53g 4.49: 160m/s = 525 feet/s
- H&N pistol match 0.50g 4.50: 165m/s = 548 feet/s
- RWS R10 pistol 0.45g 4.49: 171m/s = 561 feet/s

[Reinhamre]

Why the m/s exercise?
Use a wise and shoot. there are two velocities that makes one single hole in the target, use one! They are 3/4 of a turn apart in my LP10.

Kent

[ronpistolero]

Bottom line of all these activities is to adjust the velocity to produce the best /smallest group of shots given a single type of pellet that you prefer to use, and therefore would have ample stock of. So, as what Kent says and what I have done through the years is to clamp my gun in a vise and shoot with a minimum of 20 seconds interval per shot (to more or less simulate shooting conditions in a match). I also do it in an empty warehouse so that there would be no intervention of unexpected gusts of winds. To me, having to know the velocity is not nearly as important as the achievement of an under 6mm ctc hole with a minimum of 5 shots.

Just my thoughts.

Regards,

Ron

[Reinhamre]

under 6mm ctc hole with a minimum of 5 shots.

Ron

A 5 shot group shall not let a pellet fall through the hole in the target.
Cheap bullets will do, within reason, as long as they are graded 4,49 4,50 and so on. That means that it was important for the maker! There is also a weight aspect. Pellets that are packed separately are slightly better, use them only for important matches.
Good luck!

Kent

[pbrejsa]

Sorry to all!
I want to give Negrin a simple and easy method to settings a common velocity without a chrono only. I have two Steyers, LP10 and LP2. Both of them had the factory setting velocity cca 515 feet/s (measured 0,52 gram pellets JSB - yellow & Combro cb-625).

[trinitopgun]

i have a silver steyr i purchased 2 years ago .the velocity is very very low even with full clockwise adjustments it still dose not match the power of the other 6 black lp10 in my domain. is there a problem with this model.

[LukeP]

i have a silver steyr i purchased 2 years ago .the velocity is very very low even with full clockwise adjustments it still dose not match the power of the other 6 black lp10 in my domain. is there a problem with this model.

Email steyr tecnical from their website, i emailed for mine and for a couple of my range friends, steyr replied soon in email and send me free new replacement spring plus a bounch of o-ring. Very very pleasant to deal with.