self rifling pneumatic?

[Demon]

This is very strange...

I have a very simple pneumatic:

1 inch modded sprinkler valve with 1.25 inch x 2 foot air tank and canon.

but when i was cleaning the barrel i sawed little lines who where making perfect rifle lines... they are pretty deep: approx .5 mm by 1 mm(enough to upgrade of 10 % the range).

How could that happen?

Plz answer...

[MaxuS the 2nd]

What have you been using as ammo?

[Demon]

Only potatos, nothing else.

[MaxuS the 2nd]

This came up a short while ago.

I was going to say that if you were using something with a sharp edge, like a deoderant can then it would carve out a line or two. But a full set of rifling grooves? That would require something a little more solid than a potatoe.

Some projectiles spin as they travel down the barrel anyway, due to increased friction on one side or so.

Do you have any pictures?

[Demon]

I KNOW!!!! I already shooted a potato with rocks on it and it was stucked

in the barrel when i shooted, i was very angry because i thinked the

it was no more usable but the next day i tryed it again and maked

KA-POW and rocks disapered of my sight range fu*** rapidely(like a

shotgun blast). it is maybe that...the rocks where having sharp ends.

but the lines are perfectly the way it as to be rocks could not had made

that. Very strange...

[jrrdw]

What are you pushing the potato down the barrel with?

[far_cry]

do you have picture

[Demon]

Jrrdw:

a simple 1 inchx1 meter wood stick

Far_cry:

The rifle lines are pretty small a picture would not help(you will not see them).

[iknowmy3tables]

could one of the rocks you inserted have have a similar length to the barrel, only a bit longer so it could fit in the barrel only fit in a few ways
well my guess is that a rock went sideways during launch and happened to have an edge that was a little angled so it spun a little while grinding into the pipe

[jrrdw]

Maby that spud had a rock hard eye that gouged the marks in there. One on the way in, one on the way out.

[SpudFarm]

those thing is acctually really strange :S

then i fired a buckshot of small screws out of a 1" copper barrel they acctually pierced it.. so i don't think it could have been something really hard/big that caused it in PVC

[VH_man]

i actually tried to do this with a barrel once..........

it was a bunch of nails perfectly moulded in a hunk of epoxy......

problem was, they kinda ripped out of the epoxy and ripped the barrel to SHREDS.

all i can say is your lucky.........

[Demon]

I think i am more lucky then you think VH-man: i looked in the barrel of
my crappy 1 inch ball valve canon and they are the same 5 perfects rifle line!!!

This is the most strang thing that never hapened in the spudgun history!

[CasinoVanart]

This it not strange, i built a hybrid "hot three piece" that did the exact same thing.
I also made a thread about it, "self rifling ammo"
Yes it happens.

[SpudFarm]

This it not strange, i built a hybrid "hot three piece" that did the exact same thing.
I also made a thread about it, "self rifling ammo"
Yes it happens.

you fired tungsten carbide