A tricky problem!

[landymick]

Was it OK before the new parts ?

Check the obvious like stock screws & breach seal first.

[Rapidnick]

Was it OK before the new parts ?

Check the obvious like stock screws & breach seal first.

Honestly I don't know as the rifle came to me with them fitted. However what would have to be the problem with what looks like a well finished spring and properly fitted guides to give me such terrible groups?
Stock screws properly tightened and breech seal looks fine.

[Weasle]

Honestly I don't know as the rifle came to me with them fitted. However what would have to be the problem with what looks like a well finished spring and properly fitted guides to give me such terrible groups?
Stock screws properly tightened and breech seal looks fine.

Hi Nick

Just to narrow the fault down - is it the same shotgun spread with a selection of pellets - makes and head size?

Cheers Steve

[MattyBoy]

There must be an issue inside the barrel which is forming the pellets into a lopsided shape.

One little rust spot could do this I guess?

Matty

[Rapidnick]

There must be an issue inside the barrel which is forming the pellets into a lopsided shape.

One little rust spot could do this I guess?

Matty

Agreed-see my reply to Weasle.

[angrybear]

Is it possible for the breach block to contact the pellet skirt & deform it ?

Can you speak to the person who did the work ? he might remember the rifle having an issue from the off.

[crowbar]

I would strip the guts out clean the bore and push a pellet through it and see what I can find .
Even at 20 fps variation impact point should be negligible , shine a light down the bore and cotton bud the crown .

[Rapidnick]

Hi Nick

Just to narrow the fault down - is it the same shotgun spread with a selection of pellets - makes and head size?

Cheers Steve

We have spoken. I think you are on the right track-recrowning is probably the answer.