JSAR Raptor Tuning guide and thoughts.

[mtnGhost]

Gino, very nice work! I wish I had those machining skills! Raptor’s are similar to Marauders and here is a link to tuning one different ways if you didn’t already know. Your sound signature sounds like a strong hammer spring tension with a short striker hit, hence the louder crisp report, with these adjustments, your fps consistency and efficiency will be excellent. With a light hammer spring adjustment and longer striker hit you get the much lower sound signature but consistency and efficiency suffers a little. You can tune in between easier with your .30...I have not much leeway with mine being a .22 with the balance valve and large plenum. Anyway, glad you have yours shooting well!

That's interesting, I've had regulated and unregulated Mrods / Prods - maybe that's why I haven't had too many issues getting ES tight. I'll have to spend some more time with my Mini and use some of that process to quiet it down. I can't shoot .30 "conveniently" for a while though

Thanks, I never connected those dots! 

[ranchibi]

Gino, very nice work! I wish I had those machining skills! Raptor’s are similar to Marauders and here is a link to tuning one different ways if you didn’t already know. Your sound signature sounds like a strong hammer spring tension with a short striker hit, hence the louder crisp report, with these adjustments, your fps consistency and efficiency will be excellent. With a light hammer spring adjustment and longer striker hit you get the much lower sound signature but consistency and efficiency suffers a little. You can tune in between easier with your .30...I have not much leeway with mine being a .22 with the balance valve and large plenum. Anyway, glad you have yours shooting well!

That's interesting, I've had regulated and unregulated Mrods / Prods - maybe that's why I haven't had too many issues getting ES tight. I'll have to spend some more time with my Mini and use some of that process to quiet it down. I can't shoot .30 "conveniently" for a while though

Thanks, I never connected those dots! 

You’re welcome! Have fun.

[FelixS]

Jacob,
excellent tuning guide. I have had no need to adjust my Raptor HP .30, for my needs, it's perfect out of the box.

However, I just got a Mini and so am attempting to tune it and have questions on your terminology.

1. Hammer Adjuster
2. Hammer Buffer
3. Hammer Spring Adjustment

With no guide, explanation, or pictures, all I know at this time is that I can adjust the Hammer Spring with an 8mm allen wrench. You state, "...Hammer Adjuster where it is recessed into the adjustment range. 2 or 3 threads should be visible..." Where is this?

Thanks

[KnifeMaker]

I tore down my Reg today and refinished the nylon ball, along with installing the new one piece poppet. Nice!!! No creep, dead nuts accurate evening the bad north wind coming straight in. Shot like a match gun! Many, many .1 and .2 Inch groups at both 50 and 80 yards with my handj cast hp's. Did an expansion test, most were well over .375" FROM THE LOLEY .22. at 70 fpe Woo-Hoo!!!


Knife

[FelixS]

I tore down my Reg today and refinished the nylon ball, along with installing the new one piece poppet. Nice!!! No creep, dead nuts accurate evening the bad north wind coming straight in. Shot like a match gun! Many, many .1 and .2 Inch groups at both 50 and 80 yards with my handj cast hp's. Did an expansion test, most were well over .375" FROM THE LOLEY .22. at 70 fpe Woo-Hoo!!!


Knife

I wished I lived close! Impressive. Maybe you can share your voodoo.