Crosman 1377 advice

[Modski66]

I have squashed the spring in a vice and fitted a modified 22lr case as a guide. Can I trim a couple of coils off without ruining it?

[--ped--]

if it has a phase 1 frame it already has a guide and the sear springs on these are much lighter than the later phase 2 and current frame

[Modski66]

Revised sear spring arrangement...

http://imgur.com/NZzCfrb

The spring is from the valve, there is no adjustment, but it is just a bit over 500g pull, checked with my home made target trigger weight.

This is all getting very addictive.

[crowbar]

The link don't work for me !

[Modski66]

Phase one frame https://imgur.com/a/NZzCfrb

[--ped--]

that'll do it I make my guides so that when the sear releases the guide bottoms out just after so you get an over pull stop

[Modski66]

After lots of rested test shots, I am now convinced that the barrel has had it...
Ideally, I would like to put a 14 inch 177 barrel on it, using the existing brass front end. What would be involved in making such a modification?

Things I think might be a problem are:
Sourcing a barrel at a reasonable cost.
Getting the old barrel out of the breech.
Making the probe compatible with the new barrel.

What other advice can any of the wise folk offer?

Cheers,

Mark.