GTA
All Springer/NP/PCP Air Gun Discussion General => European/Asian Air Gun Gates => German AirGun Gate => Topic started by: Mpac on September 13, 2021, 09:51:24 PM
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Site in my gun at 20 yards 5th shot penatrated 22 gauge soft metal. Found these flower pellets laying close by. Have.135 wire installed in this gun.
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You need a better backstop! ;D ;D >:(
-Y
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You need a better backstop! ;D ;D >:(
-Y
If he sloped the plate 45 degrees it probably would have been sufficient. But then it wouldn't make cool lead flowers. ;D
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Hmmmmm.....
I have a .177 Parrus, and my girlfriend is a professional framer.
Maybe I'll make her a bouquet and put her to work..... 😁
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You still need a better back stop!
-Y
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Site in my gun at 20 yards 5th shot penatrated 22 gauge soft metal. Found these flower pellets laying close by. Have.135 wire installed in this gun.
Interesting!
Few questions come to mind:
Pellet weight?
Was the steel plate supported rigidly or hanging?
MANY Years ago, with no real Chronos around, part of the gunsmithing art was knowing how to read the pellet splats. IIRC, some writer used to call it "splatology", LOL!
Keep us posted!
HM
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Site in my gun at 20 yards 5th shot penatrated 22 gauge soft metal. Found these flower pellets laying close by. Have.135 wire installed in this gun.
Interesting!
Few questions come to mind:
Pellet weight?
Was the steel plate supported rigidly or hanging?
MANY Years ago, with no real Chronos around, part of the gunsmithing art was knowing how to read the pellet splats. IIRC, some writer used to call it "splatology", LOL!
Keep us posted!
HM
Used JSB Exacts Heavy's 10.34 grain the metal is L shaped layed upright on the ground.
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Used JSB Exacts Heavy's 10.34 grain the metal is L shaped layed upright on the ground.
Thanks for the data. I assume it was a relatively light metal piece.
IMHE, that rifle is then producing between 850 and 900 fps with those pellets.
The center of the head had enough energy to recoil independently of the rest of the pellet and extruded itself into the rear side of the remains of the pellet.
At higher impact speeds the head would have disintegrated completely.
IF the plate had been rigidly supported, then the impact speeds measured by this method would need to be reduced by dividing between 1.2
Believe it or not, 50 years ago, rifle manufacturers used these methods to test the rifles. There were few and far between chronos.
;-)
Thanks, keep well and shoot straight!
HM
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My chrony results. Looked down the barrel after each shot just a tiny smoke ball down the barrel. I put this .135 spring in last year really don’t know how many shots I have on it. Shoots pretty steady. Metal measured 1.15mm comes out 19 gauge mild metal.
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disregard this post.
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Video at 44 yards. Sorry for so many post just want to show that it is accurate.
https://youtu.be/6_wB2j92C0M
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My chrony results. Looked down the barrel after each shot just a tiny smoke ball down the barrel. I put this .135 spring in last year really don’t know how many shots I have on it. Shoots pretty steady. Metal measured 1.15mm comes out 19 gauge mild metal.
Yeah, well . . 19 is not 22, LOL!
For the 19 gauge mild steel, the 1,000-1,100 fps are consistent with the "Splatology"
Yes it is hunting accurate and it is a good gun, congrats!
The smoke ball does indeed indicate some combustion of the lubricant.
Wonder if you ever break the sound barrier in very dry/cold days.
Thanks for sharing!
HM
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Thanks for showing the powerhouse Parrus.
I like .177 magnum springers.
Have you tried a slug through it?
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Mr. Medina,
Thanks for the info about 'splatology'.
I assumed there was a way to calculate fps and fpe wituout a chrony, but I wouldn't have guessed how. Neat!
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Mr. Medina,
Thanks for the info about 'splatology'.
I assumed there was a way to calculate fps and fpe wituout a chrony, but I wouldn't have guessed how. Neat!
You might enjoy this?
https://www.pyramydair.com/blog/2009/09/splatology/ (https://www.pyramydair.com/blog/2009/09/splatology/)
-Y
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Thanks, Yogi!
What a fascinating article!
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Mr. Medina,
Thanks for the info about 'splatology'.
I assumed there was a way to calculate fps and fpe wituout a chrony, but I wouldn't have guessed how. Neat!
You might enjoy this?
https://www.pyramydair.com/blog/2009/09/splatology/ (https://www.pyramydair.com/blog/2009/09/splatology/)
-Y
Two things to note:
TG's article was written in 1998 (that's 23 years ago, LOL!)
It involves exclusively round balls hitting a solidly supported steel "splatter" plate.
For application to pellets you need to look more at what the lead does at the bottom of the skirt (thinnest part in most pellets), and decide from there how much energy is being transferred to the lead.
The effects of high velocity projectiles impacting solid objects are extremely interesting.
And BTW.- a good pellet catcher, when dealing with high power airguns, is about 5 lbs of molten lead cast into a squat cylinder.
Pellets will "fuse" themselves into the plate without any pulverization, nor volatilization, because the substrate/media that is receiving the energy is the same material as the projectile impacting the media, therefore neither part can go beyond the liquid phases.
Once there are too many pellets fused into the "backstop" you melt the whole thing and re-cast.
;-)
HM