Quote Originally Posted by aimless View Post
I would like to add some ideas, that are probably not mentioned:

Deflagration (in firearms and engines) is desired .

Firearms and engines (even the BARAKUDA air rifle) are designed in the way, that the direction of the deflagration is predetermined (e.g. engines-from the spark-plug to the piston)

So dieseling -if occuring- can be e.g. ignited on the piston-sealing OR on the port; with quite different results as you can imagine.......but IMO will not lead to recocking. Even if the pressure-wave is directed towards the piston (as I wrote before).
In a gun with a good seal the hotspot will indeed be around the port where there is most agitation of the compressed air molecules trying to escape, if the piston seal is leaking this can change things somewhat as you quite rightly point out.
eric

ps. do you still use your barakuda? and can you still obtain the glass ampoules?