How to increase power to my marauder .22 Gen1

[El_Teacher]

Hi guys, I have a Mrod gen 1 .22 cal tunned by Mac1 several years a go, but i notice that my gun has decrease from original 940 fps to 760 fps with the same cphp, I have no idea how to increase the performance of my gun.
Any help will be apreciative.
Thank you very much.

 

[Topcat]

You spring has wore out replace the hammer spring. Very easy to change springs! 

 

[John "spysir" Blount]

Wouldn't think the hammer spriung took such a set, could be though.

You need a chrony ( about $100.00 but sounds like you have one ) and basic tools. Good chance the striker travel adjustment, or other, screw moved.

You might like my friends Jeff's Blog:

https://avveduti.wordpress.com/tag/marauder/

You should have no issue readjusting your marauder if you are at all inclined to repair.

John

 

[Topcat]

"El_Teacher"Hi guys, I have a Mrod gen 1 .22 cal tunned by Mac1 several years a go, but i notice that my gun has decrease from original 940 fps to 760 fps with the same cphp, I have no idea how to increase the performance of my gun.
Any help will be apreciative.
Thank you very much.

You can always PM ajshoots he builds them and I'm sure he could direct you to the problem. My bet is the spring wore out


 

[jlc]

Have you cleaned the barrel since the FPS has decreased?

 

[JohnL57]

From what I've read on tuning, it's not uncommon for adjustments to drift over time. Most home tuners make notes of their settings. Marauders are easy to work on, here's a link to a disassembly video of the Gen 1, it's the one I watched before completely rebuilding mine.

 

[Wager]

With stock parts, I use thread tape on the adjustment screws to help keep everything in place.

 

[El_Teacher]

Thank you very much gentlemen for your opinions, checking in my mrod was the spring that causes the problem, It´s already fixed.

By the way I cleaned the barrel every 1000 pellets that I shot.

Have a nice day.