Nice video

I had a thought about the residue build up is there a difference between MG and Marushin caps with how cleanly they burn

8ace

Now there's a thought... sounds like a good excuse to fire it again

Most of my other SMGs can only manage 3 x mag fulls of 30 rds before extraction problems start.

Marushin's abs MP40 has an open barrel and well vented chamber but the Det. Pin gets coated in muck. Lithium based grease leaves a wet dirty residue while the silicone type leaves a much drier coating.
Same for the MGC MP40, 2 mags without a hitch, but the third mag will have extraction probs.

The Marushin UZI has a gas bypass system venting out of the chamber and again, 2 mags are good, the third starts sticking...

My MGC Thompsons have blocked barrels and still manage 60+ rds before starting to stick.

The PPSh has a very narrow and tight chamber. The base of the Det Pin fills the back of the cavity up leaving nowhere for the deposits to go other than around the pin and piling up at the base.

The problem's made worse because by the time I've re loaded 35 rds to let off a second mag full the crud from the first firing has started drying and sticking to the pin.

Has anyone tried drilling vent holes along the bottom edge of the PPSh chamber? That surface is open to air and might help clear the chamber of some crud?
The older PPSh's had a gas bypass into the barrel didn't they?
Did that make any difference to how dirty the chamber gets?

Looks like you have that working really well, does it take chunks out of the rounds though as thats the problem with mine now, after about 5 firings the rims of the rounds have chunks missing and that causes ejection problems and i am still not absolutly certain what hits the round to casue that damage.

claymore ..is it the force of the round hitting the ejector post that is knocking chunks from the rounds ??

If so then you need to increase the recoil spring pressure so the rounds hit the ejector at a slower rate ...
( or alter the rounds so they have a bit less back pressure )

DOC

cheers Doc i will have a look at doing that, i have already filed the ejector post so that it is no longer pointed but the damage still occurs, i also have used 38 super rounds as the base is thicker than the normal ppsh rounds but even with a thicker base the rounds get mashed.

Cerwyn,
you have outdone yourself this time mate ,that video is absolutley great ,it looks and sounds like you must have spend bloody days getting it to us all to enjoy Thank you.
Yet again it does show that the Hudson modelguns,once sorted out can fire just as good as the rest of them.

Keep them comming mate
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