First gen. Crown ballistics?

[Mr.H]

A friend of mine bought a first generation FX crown in .25 a couple years ago, (he doesn’t use a chronograph.)

I was curious about the ballistics so he loaned me it for the last couple of days. Regulator regulator is set at 120 bar, it’s set for the 25 to 30 Barrel, and then he’s got the power wheel set at Max.

Using JSB 25 gr I am getting about 900 and ft./per second. If I am using the MKII Heavy gr pellets, I’m getting close to 805 ft./s. Is that about par for the course with that rifle?. Oh, I forgot to add, it has the 550 mm barrel. If I wanted to bump up the power for him, would it be adjusting the regulator?

 

[Arzrover]

That would be about right. You really don't want to run Kings faster than that for best accuracy anyway. My reg is at 135 and I have the power adjuster on 4 but that may not be the most efficient on yours. King Heavies don't do well in mine so I'm content with Kings at 900.

Bob

 

[dvand]

I bought mine last year so Gen 2?

From the factory ran kings around 913 reg set 130ish power max.

Shot awesome. 

I bumped up the reg to try to shoot slugs faster and had to mess with the Hammer spring. I stopped messing around when I got it to shoot kings @ 930. I think it was more work than it was worth unless you want to shoot heavies.