Showing off my .30 Mrod  


Active Member Registered
Joined:2 months  ago
Posts: 11
March 13, 2018 2:39 pm  

 I've had this .30 Mrod for a few years now. Powered by a Cothran Powerhouse valve, its always been an airhog. The power his valve makes is intoxicating 😅  When I 1st assembled, it was pushing 50.15gr JSB to arpund 1106 fps/136 fpe. Way to fast for accuracy 😮

 Added a tube extension and an in tube regulator, that got me more shots per fill, but plenum limited the power to around 65ish fpe.  I recently purchased a .30 pellet mold from NOE, it casts pellets from 59gr upto 72gr. The lack of plenum kept power at same 65 fpe.

 A friend of mine, who happens to be a Master Machinist asked me if I'd thought of adding a tank via dropblock, I said sure, from where?  He crafted me a custom 11" tube, and a threaded dropblock.  Using a 500cc 4.5k psi capable CF tank, with a reg set at 2600 psi, Ive found the power I needed.

 Now sending 60gr handcast pellets for over 900 fps/ 100+ fpe. My 1st chrony string was over 30 shots before it fell off reg. Whoo Hoo!!

Hoping for better weather tomorrow so I can see how it does at longer ranges. What little testing I did indoors was WAY too much for my backstop, what a beast!!

 This project has been long and drawn out, but definitely worth it. I am stoked to have this kinda power from a .30 pellet rifle 😉

 I'll follow up with some range results, I expect tight groups. More info asap......... I have alot more info listed on my Facebook group here


Lexan fail
MAX chrony
MAX tank closeup
MAX tanked

Edited: 1 week  ago

Eminent Member Registered
Joined:2 months  ago
Posts: 21
March 15, 2018 3:53 pm  

Wow...Just, wow. I have never seen a build like that. Awesome power. Nice job.

Eminent Member Registered
Joined:1 month  ago
Posts: 31
March 18, 2018 1:42 pm  

I like it.  I like power.


Eminent Member Registered
Joined:2 months  ago
Posts: 45
March 18, 2018 2:18 pm  

Awesome!!!  That's an all day medium sized game gun! Nice work!

New Member Registered
Joined:1 week  ago
Posts: 2
March 18, 2018 7:33 pm  

Love it


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