Anyone find stiffer ejector plunger springs for a Barnards?

[KHGS]

Over 2.9mm will be too big.
Keith H

[Barry Davies]

That being the case i cannot help.
Contact "Century Springs " in Sydney. They have an inventory of over 10000 stock springs -- bound to find something that will do the job.

[RDavies]

Barry, the 2.9mm spring is a snug fit in my bolt. I have a 3mm spring and it just wont go.

[KHGS]

2.9mm is o.k. over is a no go. Century Stock #B12-39 might be the one to try.
Keith H.

[RDavies]

The B12-39 looks a bit short. I will get some of the 2.77mm springs as they have various different wire thicknesses in around the length I am after.
(maybe p.n 12529 and G82)
Thanks a lot for all the help. I will be able to find something to suit now.

[RDavies]

I have tried my new ejector springs in my magnum bolt face Barnard.
The G-82 and 12529 springs both have about the right strength to eject cases. My bolt causes the cases to hit on the ejection port and tip sideways, but are at least easier to pick out than with the old spring which did not much at all.

[macguru]

I have the same problem with my Barnard SAUM. The ejector spring is too weak ... has anyone found a satisfactory solution yet ??

Andrew

[pjifl]

Springs are easy to make.

The details given earlier are incomplete because the wire diameter nor number of turns are given.
Also you really need to know the compressed length or better the depth of the hole it must fit.

If you could give ALL the details of the spring I may be able to check that it is possible to design a stronger spring to work in that hole.
The danger is that to make a stronger spring, it needs fewer turns (yes fewer) and or thicker wire and it may either not fit the hole or when fully compressed exceed the elastic limit of the wire and permanently shorten and lose force.

Full specs really need

wire Diameter
wound diameter.
free length
required working (compressed length)
type of ends

Peter Smith

[johnk]

Was a time when Bic cigarette lighter springs, cut to size, fitted everything - particularly Remmy triggers.

[aaronraad]

Keith might already be onto these?

Stainless steel

http://www.minibearings.com.au/store/partslist/springscompressionstandardstainlesssteel/springscompressionstandardstainlesssteel/a/1/

Check the gauge of wire and length, this should give you a relative idea of loading rate of the spring under compression compared with figures given on the page.

Music wire should give higher spring force than the stainless steel spring wire of the same diameter.

If you've got a lathe you probably already know you can wind your own small springs, or convince a friend with a lathe:

https://youtu.be/i1x5_S0Pq4k

It's interesting that a few of the hunting/tactical style 3-lug bolt-action rifles are moving towards a dual/twin plunger ejector design as a standard bolt-face design (across 308W and larger) like the Sako TRG series (M995/22/42 & M10), Mauser M12 and Sauer 101. I guess like their lug design, they are thinking more are better than just making them bigger.

I couldn't see Barnard moving towards a dual plunger ejector design though, unless they were able to establish that accuracy was at least equal to their current single plunger ejector design.

I believe the Sako design changed after having issues with ejecting non-Lapua cases from their 338LM chamberings. I expect Fierce rifles will also follow suit. Extractor groove, rim and/or case-head hardness tolerances varied significantly between brands (& within batches) to the point the extractor claw was not gripping the case rim with enough force to compress the plunger ejector spring consistently.

I guess this might be another approach (gunsmithing) to the problem, in terms of inspecting the extractor groove on your cases and the efficiency of the relationship between the bolt-face, the extractor claw & the plunger. Is the plunger's spring being fully utilized, maybe a modified extractor claw will do the trick also? The belt-less standard magnum (0.532") case head design isn't new, but there might still be some teething issues from manufacturers optimizing tooling for bulk production runs?