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L57 bolt differences - help

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kj60

Well-Known Member
With the virus lockdown no work on it seemed a good time to be spend some time in the shed and get some old projects moving along. But I noticed these 'unusual to me' differences with two L57 bolts. Serial nos. are in the 2000's and the other the 6000's.

One has a smaller section that doesn't even come visible when cocked - I previously thought some part was missing but when now looking to make one good bolt out of these two - its actually quite a different size. Anyone know what is going on here? Did previous owner do some tampering to it [ie use a L46 part?] or are there two sizes to L57's. Sorry don't know the names of all the separate parts but the pics show it [whilst one looks larger due to photo angle, they really are a longer and shorter version.

Thanks for any help, and hang in there everyone.
 

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It’s certainly interesting KJ60, one has a shorter cocking piece like the later L579 rifles that were only exported here to Australia.
Does the short one function correctly ?
 
Yes deersako its does seem to function OK and the safety is very easy to operate on the short one - though I've have not fired any loads in the shorter one yet as I assumed it was missing something. Also seems to fit and function in the others action. What are the later shorter variations of L579's that only came to Australia?
 
You might be onto something there Deersako. I can't think of another reason given both bolts function as designed.
 
kj60 said:
Did previous owner do some tampering to it [ie use a L46 part?]
Click to expand...
I compared the photos with the bolt from an L46. The L46 bolt and cocking piece look just like the "long" version of the L57. I've never seen a recessed cocking piece on a Sako before.
 
deersako said:
It’s certainly interesting KJ60, one has a shorter cocking piece like the later L579 rifles that were only exported here to Australia.
Click to expand...
That was my first thought. Previously, we've only seen later generations of the L-series (those with trigger safeties) with the "short" Australian cocking pieces (as opposed to an actual "short Australian":p). If I remember our discussions on this subject accurately, the consensus was that Australian regulations during some period regarded a protruding firing pin as a hazard, so the rear portion of the firing pin assembly was shortened so that it did not protrude from the housing.
 
kj60 said:
With the virus lockdown no work on it seemed a good time to be spend some time in the shed and get some old projects moving along. But I noticed these 'unusual to me' differences with two L57 bolts. Serial nos. are in the 2000's and the other the 6000's.

One has a smaller section that doesn't even come visible when cocked - I previously thought some part was missing but when now looking to make one good bolt out of these two - its actually quite a different size. Anyone know what is going on here? Did previous owner do some tampering to it [ie use a L46 part?] or are there two sizes to L57's. Sorry don't know the names of all the separate parts but the pics show it [whilst one looks larger due to photo angle, they really are a longer and shorter version.

Thanks for any help, and hang in there everyone.
Click to expand...

well kj60, cant help with an answer, can tell you i also have an L57 243w with the same style bolt ! ser 5000 cant remember when, thought i put a photo up here in the distant past, never received one reply/answer, mine also has the mystery M hand stamped on the frame after all other markings as per dozens of other aussie sakos.
thanks for the thought hang in there.
 
susanna said:
well kj60, cant help with an answer, can tell you i also have an L57 243w with the same style bolt ! ser 5000 cant remember when, thought i put a photo up here in the distant past, never received one reply/answer, mine also has the mystery M hand stamped on the frame after all other markings as per dozens of other aussie sakos.
thanks for the thought hang in there.
Click to expand...

Sorry I missed the pic Susanna, it certainly is an interesting topic.

Any chance of posting the pic again ?
 
deersako said:
Sorry I missed the pic Susanna, it certainly is an interesting topic.

Any chance of posting the pic again ?
Click to expand...

deersako.
for sure , this is one of the sako mysterys we all know of & talk about.
not to good at this stuff. will dig my only L57 out over our long weekend.
does your rifle have the capital M stamp ?
my rifle came from tassie several years back, been beautifully reblued. stock revived but nothing really damaged, most would not pick it.
susanna
 
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