Ghost How to improve SD & ES on Ghost HP?

[EDventure Outdoors]

I've noticed my Ghost HP SD and ES increasing over my past few shooting sessions. Still shooting JTS 25.4 around 947 FPS.

Here are my results from today. Anything I should be looking at to improve or don't worry about it. I do have a BR match next weekend and need it to be at its best. I'll make enough human mistakes.

 

[Solo1]

Try cleaning your barrel.there is something about the jts I can’t quite get and i think its the lead

 

[GHairgunner]

I've noticed my Ghost HP SD and ES increasing over my past few shooting sessions. Still shooting JTS 25.4 around 947 FPS.

Here are my results from today. Anything I should be looking at to improve or don't worry about it. I do have a BR match next weekend and need it to be at its best. I'll make enough human mistakes.


View attachment 4138

What is your Regulator set at? If it is to high say 145Bar then you will have a number of shots on a nice even SD then when the bottle pressure good below the regulator you will see the hammer work better and the speeds increase. Once the speeds fall below your average then it is time to take note so you can set the regulator for a spot in that area. You want to try and use your hammer in the middle settings as you will get more shots and better SD. Hope that helps

 

[Solo1]

Mine shoots jsb mrds to 960 hw 15 and 135 bar. For jts its the same and will go down to 860 pw1. I was out yesterday and shooting 5 shot groups with jts getting 1 3/4”- 2 1/2” groups and that was varing velocity and trying a fx tuner on the end of the barrel switched to mrds and many more 1 1/4 “ groups and less flyers than jts. Really hoping the new old mrds are as good as they once were

 

[Danman]

What was the yardage Solo1 for the 5 shot groups?

I've noticed my Ghost HP SD and ES increasing over my past few shooting sessions. Still shooting JTS 25.4 around 947 FPS.

Here are my results from today. Anything I should be looking at to improve or don't worry about it. I do have a BR match next weekend and need it to be at its best. I'll make enough human mistakes.


View attachment 4138

49 shots....was that all on one fill ?

 

[Solo1]

What was the yardage Solo1 for the 5 shot groups?

49 shots....was that all on one fill ?

100 yards. And yes around 40 shots on a 580 cc bottle. I’ve had better groups when im testing pellets for average group @ 100 i hold a constant aim point and fire 5 fairly quick so im comparing apples to apples as best as i can to judge what projectile is giving the best overall group. Its funny its like my avatar and i don’t really know why but its often easy for me to put 4 under an inch and have 1 that ruins the group. The day before i had 1 exceptional group with the jts. 9/16” @ 100 for 5 shots!

 

[EDventure Outdoors]

What was the yardage Solo1 for the 5 shot groups?

49 shots....was that all on one fill ?

yes and its at ~150 bar afterwards

 

[EDventure Outdoors]

What is your Regulator set at? If it is to high say 145Bar then you will have a number of shots on a nice even SD then when the bottle pressure good below the regulator you will see the hammer work better and the speeds increase. Once the speeds fall below your average then it is time to take note so you can set the regulator for a spot in that area. You want to try and use your hammer in the middle settings as you will get more shots and better SD. Hope that helps

I'm running 150 bar and 6-8 on the power wheel.

 

[Pesty3782]

The way I tune my 's and I can be totally wrong for sure

I set my PW to around 8-10 and start my reg pressure at 100. I have a predetermined speed I am looking for...For a 30 cal it's right around 880 and I think on the wifes 22 it's around 960.

I shoot a few shots while checking the speed. If low, I bump up the reg in small amounts, until I am very close or at the speed I want. Then I use the PW to fine tune the speed on a target at 50 yards.

I might get a couple of PW settings giving me the same speed, but the groups and sound of the rifle will be different.
So I do my final tune by group and sound. I am usually under 10 ES when I am done.

Tony P.

 

[EDventure Outdoors]

The way I tune my 's and I can be totally wrong for sure

I set my PW to around 8-10 and start my reg pressure at 100. I have a predetermined speed I am looking for...For a 30 cal it's right around 880 and I think on the wifes 22 it's around 960.

I shoot a few shots while checking the speed. If low, I bump up the reg in small amounts, until I am very close or at the speed I want. Then I use the PW to fine tune the speed on a target at 50 yards.

I might get a couple of PW settings giving me the same speed, but the groups and sound of the rifle will be different.
So I do my final tune by group and sound. I am usually under 10 ES when I am done.

Tony P.

I've seen your results so something is working for you. I'll give that a try.

 

[Solo1]

I've seen your results so something is working for you. I'll give that a try.

Let us know how it works for you!

 

[JoeWillie]

For what it’s worth, I’ve found the JTS Pellets take a considerable amount more force to chamber. Whatever their Alloy Mix is it takes 3-4 times the force to close the breach on my EVOL. The accuracy, at least in my guns, I believe suffers because of this. I know others have had decent luck with them but so far I’m batting ‘0’. Just an Observation and as usual Your Milage May Vary. Good luck getting to the bottom of the issue.

Joe

 

[EDventure Outdoors]

I dialed PW to 10 and adjusted regulator up to about 120 where 25.4 JTS' were hitting about 960 ish. Dialed back a couple clicks to tighten groups. Still not to my satisfaction. I'll keep testing/practicing.

The regulator pressure seems outside the recommend range everyone is running. Not sure if that matters at all.

 

[Solo1]

I dialed PW to 10 and adjusted regulator up to about 120 where 25.4 JTS' were hitting about 960 ish. Dialed back a couple clicks to tighten groups. Still not to my satisfaction. I'll keep testing/practicing.

The regulator pressure seems outside the recommend range everyone is running. Not sure if that matters at all.

I mostly set up a daystate or in this case brk from 130-150 bar because that seems to be where they set their regulated guns that are not easily adjustable (revere 177-140 22-150) im just assuming this is what they build toward. When i got my ghost hp 177 i first had it set at 80 bar and was shooting 13 jsb to 810 and didn’t want to change as it shot such good groups. I did have to go to a light hammer spring to get that velocity. Then after the ft season was done i bumped it up to 130 bar with same hammer spring and was able to tune to 810 good sd , good groups and nearly the same shot count perhaps 2-3 shots better. So this is why i say what i do. If i were you id try some mrds and see what they will do

 

[tec]

I have emailed Huma, Daystate and BRK regarding optimal regulator set pressure range and have not heard back from any of them....My Reg .22 Revere arrived from AoA at 190 bar, and put JSB Exact Jumbos on top of each other at 40 yards "out of the box". My BRK 177 HP arrived with (what I was to figure out later) the HP2 Hammer Spring, PW on Max and the Regulator set a 130 bar. Figuring it was set up like my Revere...That first 177 H&N Bar Match pellet had a flame trail.....and the report echoed off the neighbor's houses...I think its probably half way to the moon by now
I have traded this observation with Cole, in that the Ghost, after sitting overnight it takes upto 6 shots for the velocity to stabilize, with each shot increasing in speed. Cole attributes this to the valve o-rings taking a set over time and requiring shots to "free up the valve"...he shoots the first couple shots on Max PW to do it, I typically have my FX V2 Chrono fired up so I leave the PW on its normal setting and just shoot pellets until it stabilizes.
I definitely see the velocity increasing as the bottle pressure drops...and after ~3 magazines in, I drop the PW by 1 to keep the pellets in the 860-870 ft/s range.

 

[Pesty3782]

I dialed PW to 10 and adjusted regulator up to about 120 where 25.4 JTS' were hitting about 960 ish. Dialed back a couple clicks to tighten groups. Still not to my satisfaction. I'll keep testing/practicing.

The regulator pressure seems outside the recommend range everyone is running. Not sure if that matters at all.

Did you give the barrel a really good cleaning when you got it? All of my barrels were nasty with all the protective crap inside the barrel.

I pulled my barrels and gave them a really good cleaning. It took about 30 minutes to get the barrel cleaned to where the patches came out white. If I change to a different brand pellet I clean the barrel again before working on groups….

For me if I can get 5 shots inside a dime, at 50 yards, I am doing pretty good.

The Wife’s 22 likes the shallow skirt RDM’s, but not the deep skirt.

Tony P

 

[Solo1]

@ Pesty3782 you haven’t heard anything about when the new mrds are comming out have you?

 

[Franklink]

I have emailed Huma, Daystate and BRK regarding optimal regulator set pressure range and have not heard back from any of them....My Reg .22 Revere arrived from AoA at 190 bar, and put JSB Exact Jumbos on top of each other at 40 yards "out of the box". My BRK 177 HP arrived with (what I was to figure out later) the HP2 Hammer Spring, PW on Max and the Regulator set a 130 bar. Figuring it was set up like my Revere...That first 177 H&N Bar Match pellet had a flame trail.....and the report echoed off the neighbor's houses...I think its probably half way to the moon by now
I have traded this observation with Cole, in that the Ghost, after sitting overnight it takes upto 6 shots for the velocity to stabilize, with each shot increasing in speed. Cole attributes this to the valve o-rings taking a set over time and requiring shots to "free up the valve"...he shoots the first couple shots on Max PW to do it, I typically have my FX V2 Chrono fired up so I leave the PW on its normal setting and just shoot pellets until it stabilizes.
I definitely see the velocity increasing as the bottle pressure drops...and after ~3 magazines in, I drop the PW by 1 to keep the pellets in the 860-870 ft/s range.

With mine the initial cold shots being slow is more prevalent for my 19.5fpe tune than it is for the 32fpe tune, Ie, when the reg is too high and I'm relying on really light hammer taps (via hammer spring tension/power wheel.

If I go from a "cold" gun straight to my 32fpe slug tune my first shot will be only 15ish fps slow, and then #2 and on will be in the 870-880fps range that I expect to see from those settings.

The shared condition of tec and me both seeing slow fps on "cold" shots seems to be minimal hammer tension with a reg pressure that's capable of quite a bit more power, when the hammer tension is dialed up.

If I was tuning a Ghost with end goal being absolute tightest ES and SD, I'd make it a one trick pony (one projectile at one speed) by setting the reg at a place where the hammer tension didn't do much. In other words, let the regulator be your power limiting factor (as conventional PCP tuning theory tells us we should) and don't rely on reduced hammer spring tension for reducing the power.

Tightest ES seems to come from setting the reg at a point where "10" or more on the power wheel produces the desired fps for that projectile. And the increased hammer spring tension(again, "10" or more) seems to minimize the slow "cold" shots. My theory here is that hammer tension on the upper 50% of possible means the valve stem moves more with each tap, better freeing up the "stiction" from the oring in the atmospheric chamber of the valve.

Spinning that wheel and getting lots of fps variation is really cool, but doesn't lend itself to the tightest extreme spreads. So for me I live with the greater ES (and knowing how to account for it) because I like the trade-off of shooting three different projectiles at three different hammer spring settings, all on the same reg pressure.

 

[tec]

Did you give the barrel a really good cleaning when you got it? All of my barrels were nasty with all the protective crap inside the barrel.

I pulled my barrels and gave them a really good cleaning. It took about 30 minutes to get the barrel cleaned to where the patches came out white. If I change to a different brand pellet I clean the barrel again before working on groups….

For me if I can get 5 shots inside a dime, at 50 yards, I am doing pretty good.

The Wife’s 22 likes the shallow skirt RDM’s, but not the deep skirt.

Tony P

I cleaned both my 177 & 22 barrels and they both took some effort till the patches came out clean. And i started with a brass brush and Hoppes, then on to cotton mops with JB cleaner then Flitz polish before patches

 

[Pesty3782]

@ Pesty3782 you haven’t heard anything about when the new mrds are comming out have you?

I heard February sometime.

Tony P.