Huma heavy hammer spring

[MEC17670]

Hey Folks,

Curious, has anyone installed a Huma heavy hammer spring with good results in a .25 Crown mk2? 

I've been contemplating installing one in my Crown mk2. .25 to allow for higher reg pressure .

Your thoughts please.

Thanks,

Mike

 

[Goldwing]

pearls before swines 

 

[cra627]

I had a slight velocity increase with the spring. I had velocity decrease with pin probe. Best results in testing and what I’m currently using is huma spring modded factory pellet probe, 9g hammer at 165 bar. Pellet probe mods found doing a search here on agn. 

 

[MEC17670]

I had a slight velocity increase with the spring. I had velocity decrease with pin probe. Best results in testing and what I’m currently using is huma spring modded factory pellet probe, 9g hammer at 165 bar. Pellet probe mods found doing a search here on agn.

Interesting indeed.

Where did you find the 9 g hammer? Is the pin probe adjustable?

Thanks,

Mike

 

[cra627]

9g was putchased from ebay but I just installed a 13g from fx (crown slug kit from tom at high pressure pneum). The adjustable slug probe unusable - machined incorrectly i’m returning to fx for replacement as it makes contact with magazine. I was able to fire it single shot with fx probe and again fps was less than my mod pellet probe. Which is just kinda odd