Hey all,
Started playing with the new Crown the other day, put the 700mm barrel on it and have been shooting the JSB 25 grain. I've watched all the Crown tuning vids 2 or 3 times and I feel like I have a pretty good idea of how to adjust the gun. That being said, I can't seem to find that sweet spot for the harmonic tuning. I have about 700 rounds through it now trying different settings, etc and have had a little luck but just can't get to that euphoric spot with the gun where I know it can be.
Best results I've had was with the reg pressure at 125 and 4 clicks to the left with the hammer spring from Max toward Min, transfer port at Max. I'm attaching a pic of the target I've been using and the 4 ten shot groups that were shot at this setting have a dime over them for visual reference. I know these groups look pretty good but I've done a little better with a previous FX 500. My attempt to tighten these up with tiny adjustments failed and I've been unable to reproduce the results. I've turned the reg up or down as little as 1/16 of a turn, dry fire five shots and then try several groups. I feel like I've been up and down the reg and the hammer spring. Mostly trying to keep velocities in the 850 to 890 range.
Does anyone know a good starting point to get the best results? I know all guns are different, just looking for ideas. Also, I have not altered the internal factory hammer spring setting yet.
Lastly, what does it mean if I turn my reg pressure down but the velocity goes up?
Thanks so much! Cliff
All groups shot at exactly 50 yards. Some sighters. The dime covered groups look pretty good here but just not quite good enough I think to hold up at 100 yards, trying to squeeze a little more out. Regardless, have not been able to reproduce those results after changing settings back. No wind when I've been shooting.
Started playing with the new Crown the other day, put the 700mm barrel on it and have been shooting the JSB 25 grain. I've watched all the Crown tuning vids 2 or 3 times and I feel like I have a pretty good idea of how to adjust the gun. That being said, I can't seem to find that sweet spot for the harmonic tuning. I have about 700 rounds through it now trying different settings, etc and have had a little luck but just can't get to that euphoric spot with the gun where I know it can be.
Best results I've had was with the reg pressure at 125 and 4 clicks to the left with the hammer spring from Max toward Min, transfer port at Max. I'm attaching a pic of the target I've been using and the 4 ten shot groups that were shot at this setting have a dime over them for visual reference. I know these groups look pretty good but I've done a little better with a previous FX 500. My attempt to tighten these up with tiny adjustments failed and I've been unable to reproduce the results. I've turned the reg up or down as little as 1/16 of a turn, dry fire five shots and then try several groups. I feel like I've been up and down the reg and the hammer spring. Mostly trying to keep velocities in the 850 to 890 range.
Does anyone know a good starting point to get the best results? I know all guns are different, just looking for ideas. Also, I have not altered the internal factory hammer spring setting yet.
Lastly, what does it mean if I turn my reg pressure down but the velocity goes up?
Thanks so much! Cliff
All groups shot at exactly 50 yards. Some sighters. The dime covered groups look pretty good here but just not quite good enough I think to hold up at 100 yards, trying to squeeze a little more out. Regardless, have not been able to reproduce those results after changing settings back. No wind when I've been shooting.