Tuning FX Impact M3 35 cal power destiny

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Here is the correct C1 and hammer for the .357. Notice how the delrin bumper was reversed from the hammer to the C1. The hammer weight 19.5 grams now. 

I also priced out having the hammer, hammer weight, and washers made out of Tungsten. It was ridiculously expensive. Upwards of a grand, which is far to expensive to me. 

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Just heard from FX yesterday and my .35 is almost complete. They found the leak in the first reg with a bad oring. While leak testing they found another leak and got that squared away. I asked them to just set it back to factory settings for the 81gr pellets while I wait for the slug liner. 

I've decided to just be patient and wait so I'm not wasting time and money with slugs. I have plenty of slugs waiting for when the liner comes out.

Thanks for all your testing and efforts so we can get the full potential out of the .35. When all the accessories finally come out you will definitely be way ahead of the rest of us. Keep us informed and good luck...
 
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Thanks for keeping this thread going. FedEx has had my .35 for the last two weeks, as I have been evacuated, and I am still currently not allowed to return. On the upside, it sounds like I do have a home to return to, and I am hoping to be back there within the next week and have my .35 back for testing at that time. Once I have some data regarding how my rifle was returned to me from FX firing the 81gr JSB's and the 93 gr Nielsens, I will post it up.
 
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Well I installed the Huma 2nd stage regulator today. Set the pressure at 160 bar for now. I also took the 1st reg off to check it out and relube it. Man was it tight. It takes a 24mm 6 point socket. The Huma reg was an easy install. Now it just needs to settle in.
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Here is the factory reg with the washers stacked as so. The Huma is rated 135 to 200 bar vs 170 bar peak for the factory.

I also installed the correct hammer and C1, along with the 9 gram brass hammer and 2 washers. Hopefully, I can get it to peak even higher when I begin testing this weekend.
 
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I am still trying to figure out how to achieve higher velocities. Today with the new C1 and hammer, I peaked at 912 fps using 81 grain jsbs. However, Iwas using the 9 gram hammer with both washers installed. The Delrin insert on the C1 probably had some effect on the gun, as the hammer wasn't cleanly striking it.

Never the less, here is some more data.



Original hammer weight combined with all parts

6.13 + .43 +.43 + 18.13 = 25.12 grams (mid 890's, 130 to 135 bar)



Old peak velocity hammer weight combined (921-926 fps 81 jsb, 150 to 155 bar)

9 + .43 + .43 + 18.13 = 27.99 grams



New hammer (912 fps 150 bar)

19.26 + .43 + .43 + 9 = 29.12 grams



Now that I have disassembled it again, I am debating on what combonation to try next. I will put my old C1 back in for the mean time. 










 
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I am getting pretty decent groups off hand at 50 yards with slugs. Hit pretty much everything I aim at. It seems to prefer the .357's.

I tested a couple .356 and .357 79 grainers today. .356 hit 900 fps with the .357s 5 to 10 fps less. 

I have not shot any groups on paper, but I have noticed the slugs don't group as well when on a bipod. They seem very hold sensitive. 
 
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One of the things I haven't tried yet and am debating is removing the two washers.

The confusing part is once the gun is cocked and ready to fire there would be no load on the valve adjuster spring, which is pressing against the C1 and holding the valve closed. With that thought, the closer the C1 is to the hammer, the sooner it opens when the hammer strikes it. 

Upon being hit, the C1 pushes forward into the valve adjuster spring until the valve adjuster spring force is enough to push it back the other way and close the valve. 


 
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