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Remove the hammer spring from Huma. That is too much. I tried it aswell, lightest Huma hammer and Huma spring and I was not able to adjust my hammer properly. Just use the lightest hammer from Huma, that is enough for 130 bar

A friend of mine and I experienced issues with the stock hammer in a .22 cal 700mm FX Impact. Above 120 bar, it struggled to open the valve properly, resulting in velocity loss. Switching to the lighter Huma hammer solved the problem.

Glad you solved it! Enjoy shooting again.

My Impact for benchrest at the shooting range is tuned around 960 FPS with redesign pellets. I cannot complain about accuracy. I have always read that redesign pellets arent the best for 100 yards and above, this is for precision shooting and not hunting.

Redesign pellets are not 100 yard pellets if im not mistaken.

If your bottle is attached and filled with air, but the second regulator gauge isn't showing any pressure, I would check the regulator. When I remove a regulator, I always replace the O-rings to ensure a proper seal. It seems like your regulator might be completely blocking airflow. Inspect all...

You mean the second regulator gauge? The gauge where the magazine sits

No worries, I've updated my post with an additional check. These would be the first two things I’d check. If the transfer port O-ring is blown, it’ll be louder since it’s no longer sealing the probe properly.

Check your valverod oring. Its a tiny one. O-ring 2,2x1 NBR 70 I've already replaced the O-ring twice in my Impact, and you can easily tell if it's broken. When the O-ring is faulty, the gun becomes noticeably louder when your cheek is against the cheekpiece, and you can feel a puff of air...

Thats true. Now lets enjoy our Impacts without a slow shot ;)

Im not going to fight or argue this online, but let me say this. I have his part now for over a year, I never experienced a slow shot ever again. Not even when stored more then a month due the winter temperatures. My Impact shoots super consistent, not any problem at all. See picture. Even...

if valve rods are bent from the factory you should claim warranty. I never had a bent valve rod from FX. Only thing that I had was the slow shot. Mubhaur his part is maybe indeed a bit longer, but that doesnt harm the performance. The flaw with FX is simple, its the oring that clamps on the...

Send @mubhaur a private message

In my opinion Mubhaur his part is the perfect replacement. You dont need a diamond polished valve rod. The part he makes, presses the oring in a 90 degree position so it cant clamp on the valve rod. Just like an mk1 impact had.

This is the only good fix. I can vouch for Mubhaur. Im using his part now for over a year and no troubles. No slow shots.

Tune it to the knee. Around 95% of max velocity. Many people tune it to the lowest regulator pressure possible. Sometimers a slightly higher regulator pressure can give you more shotcount.

What is the difference vs the regular valve?

I guess that is not possible due the fact the airtank is over the barrel. I think the DRS in 500mm with a long moderator looks the best. It's a smart design, and I believe FX will likely incorporate the new airtank-over-barrel design into most of their future models, as it also helps to tension...

I am from Europe so its widely available here, both models. A good friend of mine recommended the Weihrauch XL and it even makes my Impact with a slug tune really quiet. For the money its one of the best moderators I have ever used. I cannot speak unfortunately about the XLK. But I guess it...

I have the Weihrauch XL on my DRS. It is the only moderator that makes it backyard friendly. I have tested DonnyFL Sumo, Atec cmm6, SAK, and Hogan Decimeater. I swear by Weihrauch XL on a pellet tune, the DRS is a pleasure to shoot