Thinking og buying. 30 600mm barrel kit for Impact mk2

I have the 700mm slug but I would assume if you want to shoot the 44s then the superior is the one youd want.

I've gotten over 100 shots at 80fpe with reg at 100-105 with the 480cc. Accuracy is fantastic.

That is amazing 100 shoots at 80 fpe.I could only get around 70 if i remember correctly with. 22 knockouts at 950 fps. 

Also i don't know if the new caliber change kit comes with stx or superior liner.

I bellive both are ok for pellets.

Click to expand...

Its working alot harder to make 950 with 25.4 in .22 than 900ish with 44gr in .30. Mine is modded with a bigger plenum etc, very efficient!

Thanks for that info looks like you did great job on modifications an tuning. 

I was thinking i should get about the same shootcount in. 30 as in. 22 with 25gr pellets or slugs. 

This is part of the reason i decided for. 30 cal.

Click to expand...

Yeah I bet you would get around the same with a 600mm, and you're welcome. 

The slug A liner loves the JSB 44.75gr at 960 FPS. I have the slug A barrel in 700mm though with PP kit and after today the slug power kit. I would imagine the Superior would do well also. I don't think I'd go for the Superior heavy if just wanting to shoot pellets. I can't really say on my shot count at the moment as I don't pay much attention to the count, but it's two to three HC mags worth. It just depends on your reg setting and tune. If tuned 5% below the max velocity for whatever tune you are going for, you can shoot way below the reg set point and maintain the same velocities. I often do this not realizing I am shooting below the set point. I keep a chrono going and when I see the velocity drop, that's when I check it. I could set the reg lower, but I like a faster closing valve and better efficiency from a higher set point, also the extra power. I have mine set at 140 bar at the moment. You can expect to loose roughly 40 to 50 FPS going down to a 600mm.