.22 PELLET DIAMETER vs. .22lr

[asset smith]

 anyone know the exact o.d. of each of these projectiles? i know they are slightly different but i've not put them to the calipers as i dont have a working digital one at the moment and my manual ones are not that accurate. the reason i ask is i have an old stainless ruger 10/22 barrel i was thinking of milling the chamber/breech end to fit a p-rod style high rise breech. or possibly mill a groove on the underside of the barrel so it would work on a regular breech. i was thinking in terms of bull barrel on a 2250  if anyone knows those od.s let me know

thanks

[1377x]

if you sold the barrel
it would pay for at least half of a new tow or lw barrel
just a thought
the stainless barrels are sought after
i have one im thinking of selling just because people want them and paying a good price for them

[asset smith]

hmm. thats a thought. i did'nt really  think about selling it. the ones the gunsmith supply store sell are like 30 bucks but they are the blued variety.  what do you think they are worth? i guess i could give it a try, but i still might chop it up 

[1377x]

i see them going for $50 before shipping
in great condition $60
i know the aguila colibri/super colibri .22lr fits in a crosman barrel.they weigh 20gr
i have seen the od of 22lr on the yellow forum.its discussed there quite a bit.
you must be planning a powerful build
its takes a lot of air to move a 32gr-43gr projectile out of a pb barrel and still have it be stable/accurate
i remember something about the rifling and low power makes the bullet unstable.i cant say for sure i never tried just read it
google 22lr od it will turn up

[asset smith]

i am thinking more of shooting regular .22 pellets or something like rabbit magnums out of it. i think the .22lr is a couple thous larger so if anything i think the pellet would be slightly loose. but i assume the skirt would expand enough to make it a sealed fit. any thoughts? 

[Plekto]

The barrels of virtually all quality airguns and firearms in .22 are identical as it would cost too much to make custom sizes.  It's the pellets that are suffering from such poor consistency.  They get around this by cheating and having an easily deformed skirt that helps to seal it.  Many shotgun slugs (as an example) have a patch behind them to serve the same function.

[cmj21973]

Something to read:
http://www.pyramydair.com/article/Airgun_Calibers_June_2003/4

[asset smith]

Something to read:
http://www.pyramydair.com/article/Airgun_Calibers_June_2003/4

thanks cmj21973 i have read that artical before but did'nt know where to find it. this is what i was looking for

"  The rimfire barrel is sized 0.222" to 0.223" across the grooves, while the airgun barrel is sized 0.217" to 0.218"."
i'm not sure but i think places like airguns of arizona have pellet tins with exact diameter tagged on the back. pellets do vary alot as plekto stated, but apparently the barrel size does differ between rimfire and airgun.

[arkmaker †]

Seems a pellet sizer might be the ticket. I have long thought about making one that would push the skirt of the pellet out for a snug fit in my barrel. Someday, I will give it a go....

Something to ponder and might just take the picky pellet equation away from many barrels?

Rich

[eric]

the rifling between the barrels could influence accuracy between a pellet and a bullet  http://www.airgun.co.uk/Airgun_Accurracy.html

[Nightsniper52]

if you sold the barrel
it would pay for at least half of a new tow or lw barrel
just a thought
the stainless barrels are sought after
i have one im thinking of selling just because people want them and paying a good price for them

Thats how I got started in this Madness!!

[Plekto]

Something to read:
http://www.pyramydair.com/article/Airgun_Calibers_June_2003/4

That seems to be an odd practice, then, as it would make much more sense to actually use the same barrels.  I wonder what caused them to start designing ".22" rifles with almost exactly .01 inch smaller.  Perhaps some manufacturer didn't want .22 bullets to fit or somethng as lame as that and the trend just became the norm?

It seems to me that with PCP airguns, you'd almost want to use .22 ammo and barrels (actual firearm bullets (speer/horandy/etc) and barrels since you'd have the extra power to move 35-40gr.  The BC and consistency of those rounds is superb as well. 

[asset smith]

That seems to be an odd practice, then, as it would make much more sense to actually use the same barrels.  I wonder what caused them to start designing ".22" rifles with almost exactly .01 inch smaller.  Perhaps some manufacturer didn't want .22 bullets to fit or somethng as lame as that and the trend just became the norm?

It seems to me that with PCP airguns, you'd almost want to use .22 ammo and barrels (actual firearm bullets (speer/normandy/etc) and barrels since you'd have the extra power to move 35-40gr.  The BC and consistendy of those rounds is superb as well.

could have been mandated by the BATFE or something to prevent the conversion of a airgun to a firearm as the .22lr is the larger projectile. just a guess