recomendation for a lee cast boolit mold for a K31

[Soundguy]

Picked up a k31 with a receiver clamp on scope mount.

Prev owner was shooting loaded down cast, but was still too much for his arthritic shoulder.

I'd like to cast and load down for it as well.

Thanks

[Scharfschuetze]

For very light loads in my K31, I use the Lyman 311410 (no gas check) design sized at .312." Yes, it's a bit big for the normally very tightly bored Swiss K31, but in doing so, I don't have to size or in any other way work the case. I just deprime, prime, charge and then seat the bullet. While it's really just a friction fit, they make it to the chamber from the magazine without any issues and shoot quite well.

My load uses 6.3 grains of Bullseye and a large rifle primer. Velocity is 1,156 fps for a 12 shot string over the chronograph. Extreme spread and Sd are very low at 35 and 9.7 respectively.

Accuracy is just under 3 MOA and the load will ring the 10" gongs at 200 yards every shot.

For a heavier load, NOE makes a K31 specific mould that throws an advertised 180 grain bullet. It's nose is designed for the "no throat" K31 chamber so you can seat it out to a good overall length. Without digging through my mould box, I recall that its nomenclature is 311 K31.

[runfiverun]

the NOE mold is a modified rcbs 30-165 silhouette.
I use the rcbs mold and 308 data.
H-322 and a filler is extremely accurate at about 1900 fps.
accurate enough I hear moans and groans when I bring the rifle to the occasional milsurp shoots we have here.
one friend calls it 'that damned needle gun'.

[17nut]

The 31 has next to no throat so proper bullet selection is paramount.

[Maven]

Soundguy, Lee C-309-180R @ .309" was wonderfully accurate in my two K-31's.

[Larry Gibson]

Soundguy, Lee C-309-180R @ .309" was wonderfully accurate in my two K-31's.

That's the Lee mould you want.

Larry Gibson

[ukrifleman]

I get good results with the 7.62x39 155gn Lee bullet with my K31.

ukrifleman

[Kraschenbirn]

My pre-war (1937) K-31 likes the Lee 309-200 at just over 1900 fps. Off the bench, on a good day, I can hold 4"-5" groups at 200 yds using issue sights and stay on the 16" gong at 300.

Bill

[scottfire1957]

Picked up a k31 with a receiver clamp on scope mount.

Prev owner was shooting loaded down cast, but was still too much for his arthritic shoulder.




I'd like to cast and load down for it as well.

Thanks

Sorry to sound too obvious, but why not ask the previous owner about cast loads he used?