K31 Swiss mauser

[CAMski65]

Hello, newbie to forum,
I have an excellent k31 that I shoot on a local National Guard range. I do reload but not for the K31 yet. I am looking for advice on loading this 7x55 cartridge, especially the type of bullet I should use. Thanks Chuck.

 

[Herzo]

I would recommend a BTHP or FMJBT in the 168 to 180 gr range. Mine likes H4831 in any amount from a starting load to max.

Brass is another problem. The Swiss (GP-11) surplus is Berdan primed, but Prvi Partisan is Boxer. I bought 200 rounds of brass from Graf & Sons a number of years ago, but all they have now is Norma and they are real proud of it. If you are real ambitious, you can make your own brass out of .284 Win.

Dies are readily available, but in that I only have one rifle, I neck size only. I picked up a .300 WSM neck sizing die that works well as long as you watch that you don't push the shoulder back.

 

[Asa Yam]

Chuck,

Swiss made GP 11 ammunition fires a 174 grain bullet which is .308" in diameter. (Source: http://en.wikipedia.org/wiki/7.5x55mm_Swiss#The_GP_11_cartridge ) Shouldn't be hard to find a match for this projectile, as there are many good bullets in and near the appropriate weight range.

Lots of load data is available on the web. Hodgdon Powders has a site at http://data.hodgdon.com/main_menu.asp . While it does not have load data for 170ish grain bullets, it does have loads for 168 and 180 grain loads. See attachment for a "printout" of their data.

Hope this helps.

 

[Herzo]

Chuck,

Swiss made GP 11 ammunition fires a 174 grain bullet which is .308" in diameter. (Source: http://en.wikipedia.org/wiki/7.5x55mm_Swiss#The_GP_11_cartridge ) Shouldn't be hard to find a match for this projectile, as there are many good bullets in and near the appropriate weight range.

Lots of load data is available on the web. Hodgdon Powders has a site at http://data.hodgdon.com/main_menu.asp . While it does not have load data for 170ish grain bullets, it does have loads for 168 and 180 grain loads. See attachment for a "printout" of their data.

Hope this helps.

I forgot to mention that .308" is the right diameter - Thanks.
I picked up some 173 gr FMJBT pulls from Pat's Reloading a while back, but I don't see them on their site now. http://www.patsreloading.com/patsrel/prices.aspx?category=All They are also a good source for bulk powders.

 

[CAMski65]

Thanks for the help guys

 

[mike in co]

i dont often get to correct asa...so here it goes...
gp-11 is not 308.
specifically the bullet is a dual dia bullet. forward of the crimp groove is smaller that aft of the groove.
the swiss k31 is a 296x306 bore...aprox....if i remember correctly....
having said that, yes 308 bullets will shoot well in the rifle.
if you plan to reload and have one rifle buy the redding k31 resizing die. it is the only die on the market that is specific to the k31. all other dies are compromise dies that accomodate the 1911 swiss rifle as well.
when you begin reloading do not use common oal starting length. k-31's have no throat as we know it( the oem bullet is a bore rider nose). carefully assemble a dummy round and attempt to close the bolt. the bolt is fully closed with the markings on the bolt body are straight up at 12 o'clock. bottom line is that bullets have to be seated fairly deep compared to other 30 bores.
mike in co
ps it aint a mauser.......

Chuck,

Swiss made GP 11 ammunition fires a 174 grain bullet which is .308" in diameter. (Source: http://en.wikipedia.org/wiki/7.5x55mm_Swiss#The_GP_11_cartridge ) Shouldn't be hard to find a match for this projectile, as there are many good bullets in and near the appropriate weight range.

Lots of load data is available on the web. Hodgdon Powders has a site at http://data.hodgdon.com/main_menu.asp . While it does not have load data for 170ish grain bullets, it does have loads for 168 and 180 grain loads. See attachment for a "printout" of their data.

Hope this helps.

 

[mike in co]

brass can be made by necking up 284 win brass to 30 and then shooting..technically the 284 rim is smaller, but i have never had a failure to extract.

mike in co