I looking to find some information about a power tune for a brocock sniper hr. If anyone knows of anything or if there is a post already on the form I would appreciate all the help. Thanks
Brocock Sniper HR power tune
- Thread starter Zeringue
- Start date
Power tune for pellets or slugs?
I think you know you have 2 choices. Common internal porting/polishing & balancing spring, hammer, projectile weight to barrel length, valve timing, poppet spring variations & materials in stem & face/seating.
Or just add a longer barrel. Most want a short barrel. My dream gun is a heavy BR long beast but for your quest consider this.
At 24” you can estimate speed with one accurate reading. You simply add or subtract 10fps per grain. When you start into going over 24” you can gain quite a bit more per inch. I’ve seen over 20fps gains per inch. Many don’t want a 28-36” barrel.
They knew this long ago. It’s how a 800psi Lewis & Clarke’s got as many powerful shots as it did. When guns like Brown Bess, PA & Kentucky long rifles were the norm, a long barrel air gun wasn’t considered a burden. It was the bees knees.
If you’re power tuning for slugs get a no choke liner no matter the length. Good luck.
I think you know you have 2 choices. Common internal porting/polishing & balancing spring, hammer, projectile weight to barrel length, valve timing, poppet spring variations & materials in stem & face/seating.
Or just add a longer barrel. Most want a short barrel. My dream gun is a heavy BR long beast but for your quest consider this.
At 24” you can estimate speed with one accurate reading. You simply add or subtract 10fps per grain. When you start into going over 24” you can gain quite a bit more per inch. I’ve seen over 20fps gains per inch. Many don’t want a 28-36” barrel.
They knew this long ago. It’s how a 800psi Lewis & Clarke’s got as many powerful shots as it did. When guns like Brown Bess, PA & Kentucky long rifles were the norm, a long barrel air gun wasn’t considered a burden. It was the bees knees.
If you’re power tuning for slugs get a no choke liner no matter the length. Good luck.
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I’ve subscribed to this thread as I own a Sniper HR and am interested on how this develops. How much more power are you looking to get out of the gun? Why not play with the regulator setting and HS to see what the gun in stock form maxes out at?
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I’m trading my dad a gun for this one. And I believe the Huma reg is already set to 150 to 160 bar. In not quite sure. So I know I have a pressure coming off the reg. I’m really trying to figure out how to increase the hammer spring tension. I don’t want much more. Just to push a 29 grain slug at 900fps
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I found a great article on airgun depot. It explains how to do a lot on the gun. Here is the link. https://www.airgundepot.com/brocock-bantam-sniper.html
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