Tuning FX IMPACT .357 MAGNUM

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I recently power tuned an FX IMPACT M3 .35 cal. for a friend and created the beast I named the FX .357 Magnum! It came out of the box shooting the FX 81gr pellets at 830 ft/s for 124 ft. lbs. Energy. That would be fine for some guys but my friend is a "power head" like me, and so he asked me to power tune it and accurize the barrel for him. It's now shooting the FX 81gr pellets at 930 ft/s or 155ft. lbs. E...so I increased the power output by 30 ft. lbs...YeeHaa!

And it's shooting the NSA 79gr Slugs at 930 ft/s which is 152 ft. lbs. energy. This rifle shoots the 79gr Slugs with deadly hunting accuracy. A friend in Michigan recently got a 227 lb. doe with a head shot at 82 yards, and then this morning he also got a rabbit at 90 yards with his new power tuned FX .357 Magnum! 

Best regards, Chuck

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At 50yds it’s pellet on pellet

drop back to 75yds and all over the place.

im going to try and chrono it all and see where it’s at. I just wondered if anyone had settings that worked for them using jsb or H and n 

to get me somewhere close 



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Mine likes 79g NSA.



As for settings, I'll keep it simple, Max everything out. 

If you're looking for precision and power, there is a fella in Florida who can power tune your .35. If you're dedicated and aren't just kicking tires, he'll help you out. 😁



Otherwise, keep searching the forums. There's a ton of hidden info on here. 

Good luck
 
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Guest said:
I recently power tuned an FX IMPACT M3 .35 cal. for a friend and created the beast I named the FX .357 Magnum! It came out of the box shooting the FX 81gr pellets at 830 ft/s for 124 ft. lbs. Energy. That would be fine for some guys but my friend is a "power head" like me, and so he asked me to power tune it and accurize the barrel for him. It's now shooting the FX 81gr pellets at 930 ft/s or 155ft. lbs. E...so I increased the power output by 30 ft. lbs...YeeHaa!

And it's shooting the NSA 79gr Slugs at 930 ft/s which is 152 ft. lbs. energy. This rifle shoots the 79gr Slugs with deadly hunting accuracy. A friend in Michigan recently got a 227 lb. doe with a head shot at 82 yards, and then this morning he also got a rabbit at 90 yards with his new power tuned FX .357 Magnum!

Best regards, Chuck

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So whats your regulatory front and rear set at?
 
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Hey, I am new here. I am trying to max my power for deer control in my yard. I am shooting at 50 yards. I have my front reg set at 200, rear set at 150, large hammer wheel at 16, micro at about 4.9. Airflow reg is at line 5. I am using a chronograph and every time I shoot the fps goes up. It has never peaked yet. So it went from 747 to 860 in about 24 shots. I decided to wait a day or two and try again. Anyone know why this is happening? .35 cal 81 gr JSBs are being used.
 
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