No Rifling marks?

[Smitty911]

I was cleaning the barrel of my Daystate Redwolf .22 cal. Got done cleaning and grabbed a couple JSB Redesigned pellets to push through the bore.


Pushed both through and neither one had any marks on the head to speak of and the skirt just looked smoothed over, no pronounced marks.

hmmm. Out comes the dial calipers, clean jaws and start. .210, .214, .210, .209 followed by .214, .209, .210 and .211. Skirt after pushing though isn't much smaller.

So they appear to be missing 0.010" of head engagement to the bore. Maybe that can be my favorite reason to miss the target.

What are you getting for measurements on the head? How large should the head be?

Smitty

 

[theLBC]

i think diabolo (skirted) pellets are meant to expand from air pressure to engage the rifling more when you fire the gun normally.

 

[Florida_Man]

I know polygonal barrels wont leave the same deep marks as a traditional. Is it an HP model?

 

[nervoustrig]

From the tin, the heads of most pellets will measure 0.217" +0.001". The skirts are typically 5 thousandths or so larger, but that dimension is not as important because the pressure pulse forms the skit to the bore.

I have never seen any that measured 0.210".

 

[Smitty911]

I know polygonal barrels wont leave the same deep marks as a traditional. Is it an HP model?

Yes, it's an HP model, early version. I've "upgraded" the with a Heliboard,/11.1 volts, with all the upgraded internals.

Smitty

 

[Rawroots]

My selection of pellets range from .215-.219 head dia. the skirts are always larger than heads, i think you have gremlins messing with your pellets.

 

[oledawg]

I would try firing into a 5 gallon bucket of water and then look at it. I have a Lupo Rosso in .22 also.

 

[Florida_Man]

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[Feinwerk]

I think a properly fitted pellet should show some engraving on the head. With conventional rifling, even just pushing the pellets through will show distinct and graving from the lands, so maybe you do indeed have polygonal rifling. In this case, the heads should at least have a shiny burnishing around their circumference, perhaps little more than just a smear. Yes, shoot some into a 5 gallon bucket and recover them to inspect and show us some photos.