Unburned Powder

[markshaw2000]

Hi all

Whilst out shooting at the weekend we realised that we was getting a lot of unburned power in our barrells. The barrells where literally caked the full length with yellow flakes. We was using gamebore clear pigeons, 32g plastic wad.

A while back I watched a vid of George sugared saying this happens if the cartridges are damp.

Has anyone else experienced this and if so how did they cure it.

Thanks

Mark

[Lord Geordie]

Also happens with low pressure iirc!

 

My first attempt at reloading saw me using not enough powder! I was left with powder in the barrels! There was not enough powder to build sufficient pressure!

Edited February 25, 2014 by Lord Geordie

[remmyman]

All things been equal you are right to assume that these shells have been stored in damp or cold conditions. Most of us that have done any amount of shooting will have encountered this at sometime.

 

The usual cure is to put them in a warm(but not hot) environment in order for them to 'dry out'. The expert's opinion is that performance isn't greatly affected,unless, that is the problem is really excessive.

 

In my experience the only time that it has really mattered is when the residue 'fouls up' my semi-auto'!

 

Regards remmyman

[deershooter]

George Digweed puts his shells on the radiator the night before a shoot

 

Deershooter

[markshaw2000]

Thanks fir the replies lads

[kent]

George Digweed puts his shells on the radiator the night before a shoot

 

Deershooter

 

As do I especially if its very cold out. Trick is don't forget and leave them behind!i feel this makes a difference with wildfowling shells and I now store them in bunches of ten in sealed plastic boxes. Just remove the lids while they are near the rad (I put then next to rather than on)

[Guest cookoff013]

its due to lack of pressure.

 

putting shells on a radiator "can" increase pressure.

 

decent shells have a pressure above the minimum to burn the powder; most shells pop better at 9000psi or more. HP shells have a higher pressure rating but most manufacturers would never ever load right up to the limit. usually 12000psi is a great number fro HP shells and 3.5" jobbies.

 

when manufacturers load they load up to the minimum pressure that the powder burns well, and the FPS of the shell usually settles down because all the powder is being used up. (pressures must still be below CIP.)

 

faster powders usually burn at lower pressures,

 

i decent shell, is a decent shell, radiator or not.

[kent]

its due to lack of pressure.

 

putting shells on a radiator "can" increase pressure.

 

decent shells have a pressure above the minimum to burn the powder; most shells pop better at 9000psi or more. HP shells have a higher pressure rating but most manufacturers would never ever load right up to the limit. usually 12000psi is a great number fro HP shells and 3.5" jobbies.

 

when manufacturers load they load up to the minimum pressure that the powder burns well, and the FPS of the shell usually settles down because all the powder is being used up. (pressures must still be below CIP.)

 

faster powders usually burn at lower pressures,

 

i decent shell, is a decent shell, radiator or not.

 

And after a few hours in a damp environment does it help to pre warm them prior to use you feel? This is why I started onto it and I was reading up that it was good to pre-warm shells used in the cold. Out on the marsh temperatures can often drop real fast on evening flight etc. have walked out in shirt sleeves before now and come off with everything white and the net frozen stiff, it does seem to ward off the base rusting for longer

[Guest cookoff013]

?

dunno.

 

shells will increase in pressure and speed when temperature is applied to shells.

 

maybe keep your shells in presealed baggies close to your body temp.

 

i can tell you that a 14000psi load will go like the clappers, because at 14000psi, (upto sammi spec for 3.5") shells will work even sub zero.

 

most new powders now have less temperature variations.