Ghost How to improve SD & ES on Ghost HP?

[GHairgunner]

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

This is 32 shots of my 22 Ghost. 145 Regulator 8 on Hammer. This is the new Fady 22Ghost, I wasn't shooting groups just trying to get scoring for my system of tuning. It ran 987 FPS Avg, 2.5 SD, which would have been better if one shot didn't jump to 993. In my opinion this is much to fast. Going to explore 900 to 930 area for more consistent scoring. I already took my reg down to 120 to see how much hammer it takes to shoot a bit slower. JTS pellets work much better with a very polished barrel.

 

[hameditor]

View attachment 4185
This is 32 shots of my 22 Ghost. 145 Regulator 8 on Hammer. This is the new Fady 22Ghost, I wasn't shooting groups just trying to get scoring for my system of tuning. It ran 987 FPS Avg, 2.5 SD, which would have been better if one shot didn't jump to 993. In my opinion this is much to fast. Going to explore 900 to 930 area for more consistent scoring. I already took my reg down to 120 to see how much hammer it takes to shoot a bit slower. JTS pellets work much better with a very polished barrel.

Was this shooting sorted pellets, or straight from the tin?

 

[Solo1]

View attachment 4185
This is 32 shots of my 22 Ghost. 145 Regulator 8 on Hammer. This is the new Fady 22Ghost, I wasn't shooting groups just trying to get scoring for my system of tuning. It ran 987 FPS Avg, 2.5 SD, which would have been better if one shot didn't jump to 993. In my opinion this is much to fast. Going to explore 900 to 930 area for more consistent scoring. I already took my reg down to 120 to see how much hammer it takes to shoot a bit slower. JTS pellets work much better with a very polished barrel.

Also remember if you only have 1/2 or even 1 tin of pellets thru the gun everything really hasent settled in. It takes a bit

 

[GHairgunner]

Was this shooting sorted pellets, or straight from the tin?

This was shooting JTS pellets straight from tin. Normally I at least clean and oil them for practice and then add weighting them for comps. JTS great consistency in weight and size, I would say 70% are 25.4 the other 30% are 25.3 or 25.5.

 

[Franklink]

View attachment 4185
This is 32 shots of my 22 Ghost. 145 Regulator 8 on Hammer. This is the new Fady 22Ghost, I wasn't shooting groups just trying to get scoring for my system of tuning. It ran 987 FPS Avg, 2.5 SD, which would have been better if one shot didn't jump to 993. In my opinion this is much to fast. Going to explore 900 to 930 area for more consistent scoring. I already took my reg down to 120 to see how much hammer it takes to shoot a bit slower. JTS pellets work much better with a very polished barrel.

You have a 9fps spread.

With how you set up your graph it looks like a non-consistent shot string b/c the graphed line isn't straight. But you have a small interval on your Y axis, inflating the difference from shot to shot and making it LOOK inconsistent.

Again, you have a 9fps spread! (If I'm reading things correctly).

That's a realistic spread and about as consistent as any PCP is going to be. Of course you'll have guys sharing their one-off cherry picked spread of less than 5fps here and there. But those are sort of like cherry picked groups. REALISTICALLY, your 9fps spread is amazing.

 

[GHairgunner]

You have a 9fps spread.

With how you set up your graph it looks like a non-consistent shot string b/c the graphed line isn't straight. But you have a small interval on your Y axis, inflating the difference from shot to shot and making it LOOK inconsistent.

Again, you have a 9fps spread! (If I'm reading things correctly).

That's a realistic spread and about as consistent as any PCP is going to be. Of course you'll have guys sharing their one-off cherry picked spread of less than 5fps here and there. But those are sort of like cherry picked groups. REALISTICALLY, your 9fps spread is amazing.

Your right this is pretty good. I was just shooting targets and want to get an idea of where I was at the moment. It can be better like my 25 Ghost which has much tuning and time put into it I'm getting a spread of 4fps and an SD of 1.4 Now we are getting close for comp season!

 

[Franklink]

Your right this is pretty good. I was just shooting targets and want to get an idea of where I was at the moment. It can be better like my 25 Ghost which has much tuning and time put into it I'm getting a spread of 4fps and an SD of 1.4 Now we are getting close for comp season!

Look at the difference in impact point between the fastest and slowest of your 9fps spread in a ballistic calculator.

The accuracy required is not the same as benchrest, but most of my perfect scores (no misses) in field target matches have come from an unregulated gun with a 25fps spread.

Even for long range paper shooting like EBR, keep the spread less than 15-20fps and you're doing good. You'll get more effect on vertical impact points from wind than you will from a 20fps extreme spread.

As a whole, we airgunners get way too worked up about tight extreme spreads.

 

[tec]

Your right this is pretty good. I was just shooting targets and want to get an idea of where I was at the moment. It can be better like my 25 Ghost which has much tuning and time put into it I'm getting a spread of 4fps and an SD of 1.4 Now we are getting close for comp season!

When you say 4 ft/s spread..over how many shots?
Does your velocity increase slowly as your bottle pressure drops and your regulator pressure drops?

 

[Solo1]

What a guy ! His numbers are better than 1/2 the airguns in the country and he’s complaining!!!!

 

[EDventure Outdoors]

Dialed up the regulator to 130 bar but it dropped below that a bit after a few shots. Set the power-wheel at MIN. I did bump up the reg a couple times so the numbers may have been better.

I ran out of 25.4s and started experimenting with JSB 18s. This is what Fady recommended for 50 yards anyway.

SD & ES look fine from my knowledge. However, I'm worried what those pellets are going to do down range AND in the wind at those speeds. Otherwise, at 35 yard site-in distance they are perfect.

 

[Solo1]

Well if nothing else its a start shoot it at 50 and see what happens if they open up tune down a bit at a time. You have to remember too that different altitude and air pressure etc all have an effect and call for a different tune

 

[EDventure Outdoors]

Well if nothing else its a start shoot it at 50 and see what happens if they open up tune down a bit at a time. You have to remember too that different altitude and air pressure etc all have an effect and call for a different tune

My event is local so we're good there but the temperature is supposed to drop to mid-40's. Not sure how that effects things when it's 79° now.

 

[Solo1]

My event is local so we're good there but the temperature is supposed to drop to mid-40's. Not sure how that effects things when it's 79° now.

Well cold air is denser and it will most likely affect your scope too so give yourself time for sightin

 

[chas1969]

View attachment 4185
This is 32 shots of my 22 Ghost. 145 Regulator 8 on Hammer. This is the new Fady 22Ghost, I wasn't shooting groups just trying to get scoring for my system of tuning. It ran 987 FPS Avg, 2.5 SD, which would have been better if one shot didn't jump to 993. In my opinion this is much to fast. Going to explore 900 to 930 area for more consistent scoring. I already took my reg down to 120 to see how much hammer it takes to shoot a bit slower. JTS pellets work much better with a very polished barrel.

I have same World Rcd edt. 22 cal and had same super high velocities! It doses not get much better at lower reg pressures. Now at lower power wheel settings go up 1 and go up 10+ fps. So not helpful to tune.
The (green) hammer spring is way too powerful for 22 cal. (Mrd). I have 2 springs from AOA coming soon. And then will hopefully work on tuning the rifle.

 

[tec]

Based on the previous discussion...I grabbed a few minutes between meetings this morning and replaced the LP HS with the MP HS, Reg ~190 bar, Started at Max PW to get the valve-velocity to stabilize quicker (still took 6 shots, 1st 6 were all 1004 to 993 ft/s even as I backed down the PW), ended up on PW12 ~970 ft/s, the 177 MRD at ~970 ft/s were making one ragged whole at 35 yards...from a standing - bipod on the window sill position...hopefully I can get outside and shoot them at 50 yards in the next couple days. Huma got back to me via email and wants me to send them a shot string, so will use the 50 yard bench outing to generate that.

 

[tec]

50 yrds, 190 reg, MP HS, PW12: 1st 6 shots and I am thinking ok, these are tight…the next 4 …fliers?, wind?, fliers plus wind? My wind flag indicated no wind when I started, after the 8th shot i looked at it again and now maybe a very light intermittent wind.
I stopped at 10 because it would be a new tin with different bottom labeling, and inside skirts look slightly different than previous tin, that and i have zero ability/skill/knowledge how to read and adjust for wind.
JSB Ex MDR .177 13.43gr
Shot count: 10
Low: 956 FPS
Hi: 972 FPS
Avg: 965 FPS
Spread: 16 FPS
STD Dev: 5.5 FPS
30-Jan-2024 11:28:06,956,FPS,27.3,FT Lbs,
30-Jan-2024 11:28:30,962,FPS,27.6,FT Lbs,
30-Jan-2024 11:29:02,960,FPS,27.5,FT Lbs,
30-Jan-2024 11:29:27,961,FPS,27.5,FT Lbs,
30-Jan-2024 11:31:12,960,FPS,27.5,FT Lbs,
30-Jan-2024 11:31:34,966,FPS,27.8,FT Lbs,
30-Jan-2024 11:31:53,971,FPS,28.1,FT Lbs,
30-Jan-2024 11:32:09,970,FPS,28.1,FT Lbs,
30-Jan-2024 11:32:31,972,FPS,28.2,FT Lbs,
30-Jan-2024 11:32:54,971,FPS,28.1,FT Lbs

 

[tec]

So....was I shooting the 177 Beasts too slow too?....190 reg, MP HS, PW Max, ~970 ft/s, other than a POI change, 5 shots, one ragged hole at 35 yards....I guess I was...as that is way better than what I was getting at ~860 ft/s
I am going to shoot the Exact Heavy at >870 ft/s and see if they tighten up too...

 

[Danman]

So....was I shooting the 177 Beasts too slow too?....190 reg, MP HS, PW Max, ~970 ft/s, other than a POI change, 5 shots, one ragged hole at 35 yards....I guess I was...as that is way better than what I was getting at ~860 ft/s
I am going to shoot the Exact Heavy at >870 ft/s and see if they tighten up too...

I cant wait to hear what brk says about your 190 bar reg, do let us know!. I have to say being .177 it doesn't take too much wind to push em around at 50! Seems like a good Soren Drost question? Have never played with the .177 heavies but I'd bet they do like faster speeds kinda like the. 22 mrds. From watching Aim Smalls ghost vids I recall he was saying shooting pellets fast was causing some lead formation in barrel of his ghost. Have a quick peek?!

 

[Solo1]

So....was I shooting the 177 Beasts too slow too?....190 reg, MP HS, PW Max, ~970 ft/s, other than a POI change, 5 shots, one ragged hole at 35 yards....I guess I was...as that is way better than what I was getting at ~860 ft/s
I am going to shoot the Exact Heavy at >870 ft/s and see if they tighten up too...

Here’s a pic of 13 mrds 15 - 5 shot groups top row 135 bar 950 fps , middle row 135 bar 810 fps bottom row 135 bar 810 fps no mod all shot single loader 1 right after another not paying any attention to wind @ 30 yards

 

[tec]

I have watched Gert's videos too, but missed that comment or video...will run some patches and ck. Thanks!
190 bar reg-plenum pressure (that is how my Revere came from AoA) uses less air/shot, should also give a "faster" shot cycle-from the time the hammer spring hits the valve till the pellet leaves the barrel, but reduces the usable air in the bottle... I hand pump, so bottle rarely goes below ~210 bar before I pump it back up....so that doesn't bother me.
I have not seen any significant difference in ES or SD between 130, 140 and 190 bar reg press, BUT I also haven't done that "scientifically"...only by looking at different shot strings...but there very well could be a sweet spot-set pressure range of that type of regulator that does control plenum pressure more tightly.