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Update:
Trigger fixed. I removed the trigger assembly very easily with only the spring on the ejector bar to watch and not loose.
Polished the Pawl and Bar and reset the engagement angles on the...

Earlier this eve I cut the CF2 spring and put the Hunter back together using it. Greatly improved half open bolt position and heavier lift but not as good as a CF2. It would be better if some worthy...

Both springs appear to be the same pitch / wind. They are the same wire diameter and same centre diameter. The difference being that the Hunter spring is sad looking and shorter for the same number...

No hadn't thought of that. I was going to compress the CF2 spring onto the Hunter striker too see how much it could take, but that is not ideal as I could end up with an over compressed spring and...

Yes correct re CF2 action. I compared 36 turns of CF2 spring to 36 turns of Hunter and the Hunter spring is 22 mm shorter. Overall the CF2 spring is probably 50 mm longer than the Hunter but I didnt...

Probably true re strength but the lugs on the hunter are smaller than the CF2 and these are smaller again than my Rem 700 which appears a much stronger action with the enclosed bolt head. Comparing...

I checked and compared the mainspring from my spare CF2 action with the spring from the Hunter. They are both the same wire and twist but the CF2 is much stronger in itself as well as being longer...

Well Mathias, she's got a serial number starting with 5B which from what I read confirms it was a 7x57 originally, and this is what I was told. It has been re-barreled with a very attractive fluted...

So I should try some spacers to test the bolt with a greater spring tension, not a silly idea, cheers

Yes, when the bolt is lifted the 'shiny bit' climbs up the '45 degree bit' to 'cock' the action. The cocking piece then sits in the indent. Most bolt actions have a similar system but dont have such...

Thanks for that Nick. So comparing yours as well as Tuidogs photos, mine is not drastically different which confirms the mainspring as the likely culprit.
I then only have to worry about the trigger.

Would it be possible to give me an overall length for the mainspring on a med length action. I have a spare CF2 action that may have the same diameter spring I could cut to length ( haven't checked...

What parts do you have garyp ?

Cheers for the photos. I Have just compared mine with yours, looking at the relative proportions of each. Mine has a slightly narrower point between the cocking lift and half bolt positions, although...

Gee that would have been a perfect rifle !

Have some 243 cases here for you and Rob to fight over

Did you buy a new car - freudian slip?

Previous owner didnt use it very much but shot it without misfire. The cocking piece has a slight flat worn on it, I can tidy the notch in the bolt body with a chainsaw file but really need a bolt...

I have recently acquired a BSA hunter. Whilst it is a very nice rifle and a nice rifle to handle, it has three problems I would like some advice with:

1)The trigger is terrible like a cheap 22...