Swiss K-31 shooters

[Wayne Smith]

Given the short throats of this design, which boolits are working well? I just got one, but no hurry, brass is backordered with Buff Arms. I'll be looking for one or two cavity molds at the moment, not a group buy.

[Dutch4122]

If memory serves, some who shoot the K-31 have posted good results with the Lee C312-155-2R and the RCBS 308-165-SIL. The Lee boolit is a single cavity in standard form; unless you can find one of the 6 cavity group buy examples that Leftoverdj recently honcho'd for a custom run.

Hope this helps.

[KCSO]

I have had good luck with most of the Lee 30 cal bullets in this gun. The noses on most are undersized anyway and this works well with the K31's tighter bore. I use the Lee soupcan with 4.5 of Red Dot for plinking. The Lyman 31141 seated so the front band just engraves is a good load also.

[swheeler]

Wayne: the Lee C 309-200-R works OK, 10 shots @ 50 YDS

[Maven]

Wayne, What KCSO and S. Wheeler said! The K-31's short throat doesn't preclude the use of CB's at all. As KCSO mentioned, many of the bore riding designs, e.g., the Lee C309-180R, Ly. #311291, Ly. #311284, do have noses that are small for .30cal. (.308") but not 7.5mm (.307"). Also, seating CB's below the [case] neck-shoulder junction doesn't detract from accuracy in the least. Further, you'll be happy to know that K-31's shoot many different CB weights and designs very well: They handle the 113gr. Lee "soupcan" and the 200gr. Lee that S. Wheeler used shot very well. Indeed, I've had better results in my K-31 with the Lee C309-180R and Ly. #311291 than in my .30-06. Even the .30HBC shoots OK in the K-31.

Powders Use those that you're comfortable with, but don't be afraid to try #5744 (formerly Accurate Arms' production) @ 22gr.; IMR 5010, 47gr. + .7cc Grex or powdered bran over a mag. primer; or 18.5gr. WC 820.

[B747]

Given the short throats of this design, which boolits are working well? I just got one, but no hurry, brass is backordered with Buff Arms.

Wayne -- If you are having difficulty getting 7.5X55 Swiss brass, consider
getting some 284 WIN brass and necking it up in a 7.5X55 FLS die.
Works great in the K31.

I have even used Lapua 6.5mm-284 WIN brass and necked it all the way up in
one pass with a Hornady 7.5X55 FLS die --- lost one case out of a 100.
Lapua cases are definitely more expensive way to go, but the quality of
their cases is unsurpassed.

For a mould , I like the RCBS 308-165-SIL, sized .310.
20 gns of SR4759 behind it will get you about 1800fps.

Shot several sub 1" 5 shot groups at 100 yds with that load in a K31 with
Modified Iron Sights at the Military Rifle Nationals this year.

Wally