Gun sound wrt barrel length

[diskaon]

I recently attended a funeral where as per our Coorgi tradition 12 g is fired twice in quick succession as a mark of respect. since they did not have a DBBL, there were 2 SBBLs. Once was a old one with no name on it having a 30-32 " barrel and the other was a "folding shaktiman" with 20" barrel.

I donot know if it was a mistake from my side... but i felt that the shaktiman was louder than the other gun.. the same ammo was being fired (Kirkee no 4).

is it that a gun with a shorter barrel length actually makes more sound...or was it only my perception...

[Mack The Knife]

is it that a gun with a shorter barrel length actually makes more sound.

Yes.

Incidentally, your sub-title is saying the opposite. Suggest you edit it.

[The Doc]

Diskaon,

You are right. Happened with .22 LR Merlin/IOF rifles i shot using Eley bullets.

best,

RP

[diskaon]

done sir

[diskaon]

any idea what could be the reason behid this phenomenon??

[Mack The Knife]

any idea what could be the reason behid this phenomenon??

For the same cartridge, the propelling gas looses more of its explosive force as it travels down a longer bore compared to a shorter barrel. Hence, when the gas exits the muzzle, the report is relatively quiter.

[cottage cheese]

Ya Rusty's put it right ... For the same amount of powder(KF #4 in this case) a shorter barrel is noisier and also causes more muzzle blast because quite a bit of the propellant is actually combusting beyond the muzzle-thus outside the barrel. In a longer barrel most of the combustion takes place within the barrel.

[diskaon]

In one of the recent posts i read that 20" is appox the lenght req for complete burning of the charge for a shotgun.

so from 20" and below every inch you reduce the noise will be higher.. but for ever inch you increase the sound may not decrease to the same level..

I guess it works on the similar principle as that of a silencer.. reducing the charge pressure are the muzzle..

[diskaon]

In case you have the same barrel lenght .. then a 12 g will be louder than a 20g.. correct??


One more query.. does the reciol increase with the increase of barrel lenght.. (lets continue in the same thread.. caseu i dont want to start a new thread only for a yes/no ans)

[diskaon]

Yes / No answer??

In one of the recent posts i read that 20" is appox the lenght req for complete burning of the charge for a shotgun.

so from 20" and below every inch you reduce the noise will be higher.. but for ever inch you increase the sound may not decrease to the same level..

I guess it works on the similar principle as that of a silencer.. reducing the charge pressure are the muzzle..

[shahid]

12 Ga Vs 20 Ga report - depends on cartridge type. If it is a 24 gram, 3 dram eq. skeet load report will be the same if both barells are 28 inch.

Recoil - Longer barell = more weight. It will recoil less.

Why waste IOF no. 4 for cermonial fire, why not the common No. 1 shot. Preserve the no. 4 for better things ! they are getting more and more scarce to get.

[cottage cheese]

Even better simply use 12 Ga Blanks... I believe KF makes them right? or have I been looking at locally cobbled blanks?

regards,
cc

[shahid]

KF does not make them but a host of pvt. manufacturers used to make them.