Tuning Fx impact mk1 .35 kit

Hello Hello

I have been looking all over the internet now for anything for a .35 build on a mk1 impact

I got all the parts from my dealer here in Norway , but i have some questions about the rebuild

* Hammerspring, use the 57mm or the short one that comes with Powerplenum kit + 2x spacers that are inc in the kit?

* Any slugs that will work on this .35 barrel?

* Fps sweet spot for jsb 81gr pellets?
 
I put one of the kits together. Use the short spring that comes with the kit and the spacers. You need all the power you can get for the 35 cal.

The best slugs that I have found are the Nielson 93 gr. The Griffin dish base 85gr are showing some decent results for me as well.

The JSB 81 gr shoot best around 860 fps.

On a side note make sure you clean the barrel very well before you start shooting. Mine came very dirty and didn't shoot well until I cleaned it real good. It took a lot of patches to get it clean.