.25 Synrod POI Random shift

[ShakySarge]

I am stumped!!!! My .25 Synrod has started to randomly shift its POI. At first I blamed the scope, so naturally I mounted another, still happened, I did this a total of 4 times so it is not my scope. What is happening is I will zero then it is good for about 5-6 rounds, then it shifts the POI several inches in a random direction and then it will stack 5-6 pellets there and so on and so on.

My shroud is tight and centered. My barrel is clean as I just cleaned it when this started happening. My scopes have been tight and all have been good.

This ONLY happens with the shroud on. When I shoot with the shroud off I have no issues but who wants a loud Marauder?

Thanks in advance,

Matt

[Motorhead]

Un-float shroud within front support bracket.
Personally have used a strip of Hobby foam bridging the gap present with MUCH success.

There are MANY threads and talks about doing this here on the GTA and Marauder forums.

[ShakySarge]

Thanks,

Will give it a shot.

Matt

[TOM aka critter99]

have thought about a center bushing half way up shroud like BSA uses must be a reason they do it but would need to be vent thru as well

[jhm757]

Try not tightening your shroud tight against the receiver. Snug it up to the receiver then loosen it about half a turn. Works very well for me like that.

Jim - jhm757

[ShakySarge]

So Far None of the suggested methods has worked. Back to the old drawing board.

Matt

[Motorhead]

Remove the barrel from receiver, pluck out the breech o-ring.
Deburr the transfer hole within lead area and if you have a dremel & a cratex point you can size down, polish the throat & lead.
Make sure crown in clean & uniform.

generally the GM barrels don't require this ... but then again 

[ShakySarge]

I removed all the baffles from the shroud and that seems to be working for now, but will keep that in mind for sure!

Matt

[wimpanzee]

my .22 got a lot better when i put a set screw barrel band on it.


it is also now sturdy enough to lean on things, be picked up by grabbing the barrel/tube area and doens't seem to shift at all anymore.