Tuning advice

[kedmonson45]

Please forgive me for two things. First im not sure if this should go here but did not see a category that seemed to fit. 


second for the poor shooting in the picks. In my defense they where today in HOT central Louisiana freehand off the back of a jacked up pickup with my heart pounding from this fat boy trotting back and forth 100y. 


here are the fx chronograph results:

actually 58 shots not all where chronoed. 
878 Avg FPS at about 90 FPE using JSB Diabolo 44.75. Reg is right at 100bar from utah airguns on a FX Impact X MK2 with a superior 700mm liner in it. 

this was holding1-3/4 mills low at 25 and dead on at 50. 


after fiddling with scope (which is not for airgun hunting. 

after struggling to get a steddy position leaning on truck i finally got the above 8 in black at 100Y im guessing 3” or less. Dident bring my calipers. And 7 in center about a inch at 50 holding last mil dot on 100Y and 1-3/4 mill low at 50Y



now for my question. What is yall best advice on improving this setup beyond a bypod (which im working on got sand bags just just not smart enough to bring them). I want to work on best tune because i hope to be doing 50/50 bench and freehand shooting ((for fun not competition) the targets show ill not be ready for that ever)



my gun is:

FX Impact X MK2 700mm superior liner .30 cal

ammo JSB Diabolo 44.75

reg: 100bar

Power wheel: Max

hammer spring: .688

Rebound valve: .335

From 250bar 5 mags later has tank at about 125bar


in all my life i think i have found a airgun that shoots infanatly better then i can shoot it. 

 

[Yo]

Please itemize the first 10 shot chrony numbers in chrony-logical order.

PS I don't think I've been too naughty this year...

 

[kedmonson45]

Shot count: 36
Low: 858
Hi: 895
Avg: 878
Spread: 37
STD Dev: 10.5


881
858
881
865
891
863
870
891
886
888



this is the first 10 in the shot string. Though i think i may have had the pellet weight set at 50gr and not 44.75 in the fx chrony app by mistake. 

 

[Yo]

?

Don't "no" what infanatly means.

Google doesn't either.

 

[Yo]

How many total shots have you run through the gun?

 

[jphef]

Your speeds look like mine did with a new Impact, I had to shoot it a while to get the reg settled, it would vary shot to shot until I had a tin of pellets through it. After mine settled in I slowed it down to 850 - 860 where it shoots great

 

[kedmonson45]

Haaaaaaaaaa hahahahaha finally i know more than google. Infanatly, (hold on let me check my spellun on thisun)... now where wuz i, oh yeah infanatley it means to always spell at least one word wrong, to infinity and beyond. only thing is i'm a over archiver  and somehow manage to misspell just about every other word.

 

[kedmonson45]

oh yeah, forgot one of the most importante bit's o info. less than one mag shy of 1 tin. hope to do more tomorrow depends on the rain..

 

[kedmonson45]

ok. that explains something. Reg pressure was right at 120 when i got it and after the first 1 or 2 mags it seemed to settle at 103 ish and is now setting at 100. what spread and deviation do you get now.



How many shots would yall say should season the barrel properly?



as an example i used to tell people never carry a gun unless you put 100 to 200 rounds through it, then i bought a sig P365 now i say 500 to 1000 <G> so are pcp about the same?

 

[jphef]

Been a while since I shot over the chrono but it has always been less than 15 fps spread and usually better than that depending on the tune. I think with slugs it was 4 fps spread. Mine was funny, turn up to 140 bar take a few shots and it was back to 130, I think I did this 3 or 4 times before it stayed at 140 and other times it would go up and down between shots by itself. I do remember that I put a couple drops of silicone oil in the air hose when I filled it thinking a little lube couldn't hurt the reg situation.

 

[Yo]

You are "write!"

 

[Yo]

MAYBE Shoot it more "sense" "its' " still "two" "knew". It may settle "inn" on "its' " own (OR "KNOT").

 

[kedmonson45]

Yooooooo you and spook just like me }

 

[baloo]

My reg did the same thing. Started at about 110bar settled down to 93bar. Brought it back up, back on track.

My suggestion would be don't mess with anything till you get some more rounds thru it. 

 

[vdwb]

Shoot it some more and let those Belleville washers settle in. Might take a tin or more. Also, wait long enough between shots for the reg to fully refresh.

 

[kedmonson45]

That seems to be the best and most popular response. I'll do that. thanks.

 

[kedmonson45]

I cast several hundred jsb style diabolo pellets. think i'll blow a few hundred through tomorrow. i kept all my cull cast pellets just for this reason.

 

[kedmonson45]

ok this is what i managed today. My FX chrono is not catching all shots may be because i'm shooting down a lane in the woods with random weeds and small saplings in the lane what do yall think.

Notes: A Target #1



Shot count: 5

Low: 844

Hi: 865

Avg: 856

Spread: 21

STD Dev: 8.6

865

851

856

863

844

Notes: A Target #2



Shot count: 5

Low: 842

Hi: 868

Avg: 858

Spread: 26

STD Dev: 11.3

868

851

861

842

868

Notes: A Target #3



Shot count: 4

Low: 856

Hi: 872

Avg: 864

Spread: 16

STD Dev: 6.6

863

856

872

863

Notes: B Target #1



Shot count: 7

Low: 823

Hi: 875

Avg: 848

Spread: 52

STD Dev: 16.7

823

842

844

875

842

844

863

Notes: B Target #2



Shot count: 6

Low: 823

Hi: 861

Avg: 836

Spread: 38

STD Dev: 14.1

826

828

861

840

823

840

Notes: B target #3



Shot count: 6

Low: 842

Hi: 863

Avg: 855

Spread: 21

STD Dev: 8.6

854

842

863

863

849

861



picks of un sorted NOE diabolo pellets

46g

48g



The above where shot with NOE molded Diabolo 46g and 48g pellets unsorted and un-culled ffrom casting as long as the pellet came out in about 97% good shape.i used them just to see how well they do as is. looks like they would be good for cats out to 50 yards. (wait did i say cats?.... they are legal targets right?... never mind forget i said anything No habla policia)



i'll keep shooting a few more tins to see if reg settles down i'm only at about 250 rounds down the tube so far.

 

[kedmonson45]

Airgun nation post 8/16/20



Gun: 

FX Impact X MK2 700mm .30 with amp reg and power plenum. 



Scope:

Athlon Argos BTR (Gen. 2) FFP 6-24x50 APMR IR MIL reticle



Factory settings:

Power Wheel. : Max

Hammer Spring.: .688”

Rebound Valve. : .335”

Regulator BAR. : 110

Speed. : 644 fps

Pellet. : NOE Diabolo 51g



900+ shots later



First tune:

Power Wheel. : Max

Hammer Spring.: .607”

Rebound Valve. : .335”

Regulator BAR. : 120

Speed. : 905 fps

Pellet. : NOE Diabolo 51g



Regulator was set to 125 BAR and was shooting 930fps after 200+ shots the regulator settled at 120 and i took speed down to 907 with the rebound valve. Hammer was adjusted to just under max. 



The pellets are cast from pure lead using the NOE pellet mold from NOE bullet molds. 



Not weighted or sorted just lubed with silicone spray as they dropped. 



The mold is designed to throw 46g diabolo style pellets but with the probes installed you can get 52, 50, 48, 46. Depending on the alloy of lead. 



The sight in and test at 25 yards was one ragged hole you could cover with a penny. 



This is the 50Y targets. StrelokPro said 2 clicks up so thats where i set scope. 

I pulled one. 

And again. 

Off the regulator and out of time. 

Did not have time to shoot 75 and 100 yards but maybe soon. 



Fx Crony was 

898 min

905 max



Will need more shooting to see if the spread opens up. Will fine tune horizontal adjustment when i shoot next time, looks like i need to adjust to left. I tend to shoot left with small handguns and right with rifles so i really just need to shoot more and see. 



What do y’all think? Any advice?





Kevin



Philippians 4:13