Rifle is .22 cal, will be shortening the barrel tomorrow. The gun is a Hatsan Flash. What can i realistically expect as far as velocity from a 13" barrel?
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Max Velocity of a 13" barrel?
- Thread starter Peep
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Find out what speed you're getting at x length of barrel. Subtract 15-20fps per inch you cut off, that should get you close.
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Honestly, probably a lot. I did some testing with my fx Crown, and I was able to squeeze 800fps out of 7" without really trying. I also have a 7.6" barreled .22 pistol that would get into the mid 800s at max power.
I recon it should be no real issue to do 850 with a reasonable tune. I'm sure you could do more, too.
I recon it should be no real issue to do 850 with a reasonable tune. I'm sure you could do more, too.
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How is the accuracy on the 7.6 barrel at 800+fps? One of my most accurate Crosman barrels, a 14 inch .22, shot great at 630fps but anything over that it was totally worthless.
I think that was the barrel I ended up switching the crown end for the chamber as the chamber end was too tight and it shot horribly until I changed it around.
I think that was the barrel I ended up switching the crown end for the chamber as the chamber end was too tight and it shot horribly until I changed it around.
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You should be able to get the same speed you were getting before the cut. Just know you will use more air per shot to get the same speed
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with my dream tac compact 22 cal i went from the 320 mm barrel to the 500 mm barrel and picked up 120 fps with the same pellet so basically i gained 17 FPS per inch of barrel or per 25 mm of barrel
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Honestly have no idea, lol. I have that gun de-tuned to 550fps with 16gr's. It's extremely quiet and has a trully ridiculous shot count (for a pistol)
Some day I'll do more testing with it.
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hatsan barrels are choked, depending on the pellets you are using, you may need to have a larger pellet to keep performance... I know my Hatsan Gladius is a 0.213 at the muzzle (0.215 wouldn't fit), based on the tools I used to recrown it...
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