Fat barrel

[honeysuckle]

I see bull barrels common on PB benches but skinny tubes on airguns.
Would not a heavy varmint barrel machine up for an airgun?
Just something I have wondered for years...

 

[GeneT]

The primary purposes of a heavy barrel on a PB are reduced barrel harmonics and heat dissipation. Airguns produce negligible heat and tiny harmonics. You'd really just be adding weight.

GsT

 

[dizzums]

key word is heavy .. some guns got plenty of room for it if theyre shrouded etc ..i think its more of a long range thing though, doubt any measurable improvement in accuracy will be occuring at 50yds with a heavy barrel .. more depends on bore specs condition and quality ..

 

[Bramezy]

Have also wondered for years of the same but yes, they are slowly starting to increase the barrel thickness on larger caliber. I feel thats where its at anyway, .30 cal. Id love a 1.2" RF blank milled up and cut by Lothar in a 1:36-1:40 twist. Bet that bad boy shoot lasers! I think the Panda is the closest thing really out there now with a thicker barrel.

 

[Stubbers]

The primary purposes of a heavy barrel on a PB are reduced barrel harmonics and heat dissipation. Airguns produce negligible heat and tiny harmonics. You'd really just be adding weight.

GsT

Heat dissipates quicker with thinner barrels than thicker...its not dissipation but rather the ability to just, not melt/deform...more integrity retention than heat dissipation. Retaining bore integrity also applies to harmonics.

-Matt

 

[cosmic]

I think the receiver needs to be bored out to accommodate bull barrels..

 

[Stubbers]

I think the receiver needs to be bored out to accommodate bull barrels..

Not necessarily, you could turn down the barrel where it goes into the receiver as well, the thickness going in where there are points of contact/retention isn't as crucial as the unsupported length of barrel.

-Matt

 

[Firewalker]

Bull barrels are common on BR airguns.

Heat is not an issue with airguns, the compressed air exiting the TP expands causing a lower pressure and a temperature drop.

Thin barrels can be stiffened or weights added to tame the frequency of the barrel whip.

 

[steve123]

Most airgun receivers aren't stout enough to hang a Fat barrel off of. Not designed for it to begin with.

For most matches the use of heavier guns helps them stay planted better and a heavy barrel is a good way to weight or balance a rifle.

Yes, also Fat barrels are stiffer.

Someday I'd like a pcp with a Fat barrel.

 

[JungleShooter]

Have also wondered for years of the same but yes, they are slowly starting to increase the barrel thickness on larger caliber. I feel thats where its at anyway, .30 cal. Id love a 1.2" RF blank milled up and cut by Lothar in a 1:36-1:40 twist. Bet that bad boy shoot lasers! I think the Panda is the closest thing really out there now with a thicker barrel.

1.2" diameter barrel — on an airgun....
Mmmm, not sure — even on a large caliber .30cal there would be:
0.3" (7.6mm) hollow, surrounded by
0.6" (15mm) of steel wall all around
That would be 3 times the barrel wall compared to the diameter (caliber).


I'm quite happy with my RTI barrels — they are 0.6" (15mm) in diameter and feel very solid and inflexible, even at 60mm in .30cal....


But what do I know.... I'm still pretty green when it comes to barrels and interior ballistics.

Matthias

 

[Bramezy]

1.2" diameter barrel — on an airgun....
Mmmm, not sure — even on a large caliber .30cal there would be:
0.3" (7.6mm) hollow, surrounded by
0.6" (15mm) of steel wall all around
That would be 3 times the barrel wall compared to the diameter (caliber).


I'm quite happy with my RTI barrels — they are 0.6" (15mm) in diameter and feel very solid and inflexible, even at 60mm in .30cal....


But what do I know.... I'm still pretty green when it comes to barrels and interior ballistics.

Matthias

Yup or similar. Just want to try, been curious for a long time. Dont have a lathe or feel like spending a ton to have one made so it will stay a curiosity for me.

 

[Jaxjax]

I goona do one as my next & hopefully final project as it will take $ & time. Basically a pcp rail gun with RAW action. The barrel will be clamped in gunsmith barrel clamps & air/ regs etc.. all ran external, so no bottle clearance issues. The action will not see no stress. I'm going to make it extremely heavy ....
but for now I have barrels turned to .71 & .75 then machined for action. .625 ish for RAW & no internal oring so easy peasy. I have a Shilen bieng action fit now & will be fun to play with. RF barrels are over looked & shouldn't be as spec varies on these............. there are pb ,30 barrels out there that will work in air land. Kreiger is one of them. a .30 "tite"