tumbling pellets?????????

[woodchip 2]

Anyone got any ideas what causes this ?

[porkycrook 466]

Have you got a silencer fitted because perhaps the pellets are catching that on its travels?

[woodchip 2]

yes but it still happens if its removed

[Baghdadnights 150]

What rifle and pellets you using

[woodchip 2]

air arms s410 in 177cal and same pellets ive always ran throught the gun for the last 4 yrs but ive recently had it serviced

[woodchip 2]

i never had any problems with the gun untill i sent it off to be dipped (hydrographics) and serviced now at 20mts its perfect but anything above that the pellets tumble and theres no accuracy.

[Buster321c 1,010]

The barrel needs re- crowning then mate.

 

If the pellet leaves the barrel , and for arguments sake , one side of the skirt clears the barrel before the other it will cause `wobble` .

 

If the barrel is re-crowned this will no longer happen as the crown is square to the bore .

Edited June 14, 2012 by Buster321c

[woodchip 2]

^{this was shot group at 50m}

Edited June 14, 2012 by woodchip

[Baghdadnights 150]

Have you run it over a crono to check the power if it's just been serviced. Do air arms suffer crown probs buster thought that normally prob if shortening or threading for silencer

[Baghdadnights 150]

Might be worth removing the barrel to have a look through in case the rifling has been damaged or debris from dipping inside

[Buster321c 1,010]

Any gun can have crown damage mate , sometimes it can be the smallest thing that can throw them out .

[woodchip 2]

ok so how do i remove the barrel?

[matt_hooks 188]

How do you know they're "tumbling"? A poor group doesn't necessarily mean tumbling. You say it's fine to 20m, but goes wrong thereafter? Sounds more like a power variation to me. Who did the tuning, and what exactly did they do?

[Buster321c 1,010]

Send it to Julian Bond of Air Arms Spares .com , there`s no better Air Arms bloke that i know of .

[woodchip 2]

i sent it off to Dip-it ! he serviced it and now wont answer any calls?.

you can see in the pic they tumbled .ive also take the gun to a local range where some air rifle target shooters are and they all said the pellets are tumbling .