Max FPS

[Ghulam]

Hey Guys
i would like to know what are the max fps of the following guns with 18 gn JSB, and are these guns good for slugs
1. FX crown with 380 mm barrel .22
2. Uragan .22
3. Brocock bantam Sniper HR

Cheers

 

[Mr12PM]

Hey Guys
i would like to know what are the max fps of the following guns with 18 gn JSB, and are these guns good for slugs
1. FX crown with 380 mm barrel .22
2. Uragan .22
3. Brocock bantam Sniper HR

Cheers

Hey.
I have the Crown Mk2 continuum. With the 380mm, reg at 140, hammer spring at 9 turns (haven’t measured it yet), Power setting on max and HS knob on 23, I’m getting 868 with the JSB 18s and 950 with the JSB Knock Outs. Yes, with the 380.

I love the tune I currently have (the one above). I turn down the PW to medium and HS knob to 18 and I’m getting 915 FPS with the JSB 18s, above figures for the 25gr Knock Outs, all with the same zero at 50 yards.

The 700mm barrel gives an increase of 125-150 fps with each of the above.