New Crown 22 ready for accuracy testing!

[Bob_O]

Just finished setting up the new Crown. Cleaned the barrel first like I always do and took all but a smidge of slack out of the hammer spring (power wheel) adjuster.

The regulator gauge was reading 130bar out of the box. I ran several 5-shot strings at different power levels at 130bar but didn't get the performance I wanted.

I increased reg pressure to 135bar and ran some more 5-shot strings. All with the JSB 18.13gr pellets. I ended up with what you see in this chart.....Transfer port set on 177/22 and power wheel on 5.

Interesting enough I tried a few 5-shot strings on the 25/30 setting, and on power wheel 4 I got Avg of 918fps, ES of 5, SD of 2. This gun will have plenty of power to work with when my Slug liner comes in.

 

[HD2010]

Dang you got right after it. 

I haven't messed with my settings yet. Regulator was set at 138 bar from UA and PW at max. I'm very happy with it's accuracy for now. I'm sure it will get better if I tune it. But just to happy to mess with it now. I just ordered a chrony yesterday so I may mess with it later when it warms up.

How much slop did you remove from PW adjuster? Did you get any data before you made adjustment?

Can't wait to see the first video of you and the Crown in action.

 

[Bob_O]

I considered trying it "box stock" but when I saw how much slop was in the adjuster, I just had to remove it. Ernest Rowe maybe, or others have said the first thing that should be done is to remove the slack so that's what I did.

Here's a pic I took before adjusting it....it shows how much slack was in there....A LOT!

 

[HD2010]

I think Matt Dubber did a video on it too. And maybe the Meathead Marksman.

I guess I know what I will be doing when my chrony shows up.

Thanks for the pic.

 

[2D1C]

Smiling at ya Bob. Congrats man.........Sweet strings all ready, You got a great place to start from! That HST wasn't doing anything, zip, none, nada!! You should have the upgraded reg, it would be (will be) seeing what they did. OH whatch those little BB'S they are bitch to find. LOL

Dennis

 

[Guest]

Wow Bob that is some very impressive tuning there...I think I would leave it on the 25/30 #4 setting and shoot the heaviest projectiles that are accurate so as to carry the most energy down range. I think Dubber has been using some Nielsen slugs with good results according to his last video killing pigeons on a cattle farm with his Impact. Seems to me like that Crown must have a very good regulator in it as opposed to some other guns. Here's hoping you have a ton of fun with it! 

Best regards, Chuck

 

[Bob_O]

Thank you CHUCK....compliments on tuning mean a lot especially coming from you.

Good and bad news for today. I'll start and end with the good.

GOOD

I got out to the range despite the weather, 39*F and light rain.

Gun grouped tightly at 50 yds....1/2" and under.

BAD

The gun would not group well at 100....my guess is the 18gr pellets were destabilizing at 880fps.

The gun/shots did not sound efficient at all.

GOOD

I did another round of Chrono work and found two new settings that gave good results and the gun sounds 5 times better!

Reg pressure reduced to 125bar. Transfer port on 177/22, Power wheel/HS on 1 for the 18.13gr pellets.

For the 15.89gr pellets, Transfer port on 25/30 and Power wheel/HS on 3.

There were a few combinations of pressure, port and power wheel that gave me the velocity I wanted, but these two sounded the best/ quietest.

Check out the muzzle end of the shroud...thin layer of frost on it!

 

[Guest]

Well I know you are going to get this Crown shooting perfect because like me you are just by God determined to figure it out...you are not going to let it go until you do. There are no books on this stuff so we just have to use trial and error and our common sense to figure it out. One thing to bear in mind is that your going to have to put one or two cans of pellets through her for your reg washers to settle in together completely, but so far it is looking very promising. I am sure there are a lot of guys with Crowns watching your progress intently. 

 

[HD2010]

Nice homework Bob_O. I'm sure you will have it set up lights out for sure. Now I can't wait to get my chrony. I think it will be here Monday or Tuesday.

 

[Bob_O]

HD,

You're going to like the Chrono....it will tell you how your rifle is performing.

My shroud adapter will be here Monday. This gun needs a suppressor in the farms I shoot at. Tomorrow I will be using the Sumo on the barrel without the shroud.

 

[HD2010]

HD,

You're going to like the Chrono....it will tell you how your rifle is performing.

My shroud adapter will be here Monday. This gun needs a suppressor in the farms I shoot at. Tomorrow I will be using the Sumo on the barrel without the shroud.

Yep, can't wait. 

I have ordered the adapter and Sumo also. I hope I got the right one. I got the the adapter and 1/2" UNF Sumo. Is this correct? I think noise reduction will help where I shoot also. If not they still look cool.

If I have any questions when I start tuning mine can I PM you?

 

[Droptine26]

So happy for you Bob. I’m sure it won’t be long before we see your new rifle in a pesting video. Can’t wait. Congrats!

 

[Imold]

Definitely nothing to sneeze at, looks pretty darn nice and your just getting to know her, nice. Can’t wait for some pesting videos with it.

 

[Glem.Chally]

Excellent, looking forward to some live and paper targets!

 

[Bob_O]

My longest shot on a pigeon.....117yds.

 

[Patrick]

HD,

You're going to like the Chrono....it will tell you how your rifle is performing.

My shroud adapter will be here Monday. This gun needs a suppressor in the farms I shoot at. Tomorrow I will be using the Sumo on the barrel without the shroud.

Hey Bob_O!

what Chrony do u use?

awesome results on your crown, I think I’ll also buy a crown but in .25.

keep up your great work! Also like your YouTube channel a lot!

 

[Tomiboy]

The 22 is too loud with the factory pull out shroud? That's disappointing!

I guess the 25 and 30 must need help too then!

 

[Bob_O]

Busy with the family......short vid.

I'll work on the other one tomorrow. And maybe catch up in the thread later tonight.

https://youtu.be/58klwYZis2A

 

[2D1C]

LOL your rollin now!

 

[Droptine26]

Great shot! Can wait to see the full length video!