mauser bolt hardness on open

[CCAMERA50]

Hi ,

first , thank you for opinion

...all the cosmoline elimination it is the first operation i make when a gun come into my hom
...the firing pin spring , it seem to be jus his own , ( ...effectively too "hard" ) however to
"improve" the trigger ...shoot ( correct word ? ) i made a softer spring to test tomorrow
when i will go again to the range for test again

....even renting the K98K range property to see differences also trying a bolt exchange

....continue to the next episode

CC

.....Range close for maintenance works - re-open the next week

aaaghhh !! .....grrrrrrrrrrr

[Al Diehl]

I have a Mosin Nagant that I had to shim the rear action screw because without it when tightened I guess the receiver flexed just enough to bind the lugs. Just cycling the bolt I could feel slight resistance but after firing I had to beat it open. All good now....

This describes a Finn Model 91 I have pefectly. How much shim did you have to use to correct this?

Normal cycling no problem but, fire it and you have to use a mallet to open it.

I have cleaned the chamber and even made a crocus cloth polisher and ploished the chamber. No luck. I will try the shim up.

Thanks.

Al

[WarPig1976]

To be honest I didn't measure. I just thinned a washer I had in my "you never know" nuts,bolts,washers bin until I felt no resistance. Also, I used cork gasket material to keep somewhat good receiver/stock contact cut to fit around the washer.

It's a bubba job but it's a range rifle and reversible...

[Al Diehl]

Thank you and, at the risk off hijacking the thread, I did a similar shim to the action mounting screw on my M1969 Romanian .22 because the screw was bottoming out before it could snug the receiver to the stock. An unexpected result was that the rifle fed 90% better from the magazine after I installed the shim.

(Backing out of CCAMERA50's thread.)

Al

[CCAMERA50]

Hi guys !

finally i tested the first changes :

- firing pin spring replaced by another more "human"
- thread of the rear block bolt lubed with copper grease ( and helicoidal "rail" also )

now the required force to open after firing it is "normal" ( with the same crtgs loads then before )
and consequently even the trigger required force it is fallen to 1,7 kg = 3,7 lbs
the percussion it is still excellent - the result on target at 100 mt ( open sight ) it is 5 shots into an inch

....really a"tack driver"

however i wouldlike still study/"go around" the helicoidal size of the hammer and also test the bolt exchange

...i will tell you again

regards

CC

[WarPig1976]

Looks like you solved your problem... I think....

[CCAMERA50]

Looks like you solved your problem... I think....

i ...hope / trust

....reasonably it seem it was a bolt problem

but ....let me see and test again

surely i will say you something more about it

regards

CC




i will look about again

[CCAMERA50]

Hi guys ,

yesterday i gone to the range with the Persian for the last tests
.....before to put it to the foundry

i made :

- an accurate cleaning ( shining ! ) of the rear of the bolt tube ( where is the helicoidal
ail ) by a good bodyshop polish
- an accurate cleaning ( by the same method ) of the receiver rails
- an accurate greasing by copper grease of the rear bolt tube internal thread , and
also of the helicoidal rails and firing pin and f.p.spring
- the springs was already changed by a set of more soft springs

well ! finally a perfect , velvety handling before and after each shoot
....and it shoot very well also ( three holes in an inches at 100 yards by open sight )

really .....a "happy end"

Thanks at all !

regards

CC

[WarPig1976]

Sweet is the taste of victory, Good job!!