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Making brass for Swiss K31 and K11
Last edited by Password; 02-14-2022 at 04:15 PM.
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Thank You to Password For This Useful Post:
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02-14-2022 04:11 PM
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Legacy Member
Note - There is a head size difference between the .284 Winchester case and the 7.5 X 55 Swiss case. The .284 has a head size of .473 inch and the Swiss 7.5 X 55 case is listed as .495 inch. The Swiss case head is .022 inch larger than the .284 Winchester case. Even though the .284 case has a smaller head size, both of my rifles extract these cases just fine even with the smaller head.
Bob
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Contributing Member
At $1.50 each after taxes and shipping, I get a case of loaded Prvi ammo (plenty on GunBroker), and the brass is fully reloadable.
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Legacy Member
Yes - but I live in Massachusetts and unfortunately most online sellers will not ship loaded ammo to me.
Bob
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Legacy Member
You could start out with 6.5x55 brass as it's .480" at the Head Dimension.
However, you need the PPU, Lapua, Norma or some other European brand of brass, although Starline brass might measure out at .480" as well. The reason being is that the North American manufacturers "cheat" when producing 6.5x55 ammo and brass by using the .308~30-06 head size as they can incorporate it easier into their production lines. Thus the head size on their ammo and cases is the nominal .473".
A search for properly sized 6.5x55 will get you closer to your goal than .284 brass, but still not spot on.
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Legacy Member
As I mentioned above, the very small difference in head size between the .284 brass and the 7.5 X 55 brass (about .022 inch) doesn't seem to make in difference in my two rifles (K11 and K31). The Swiss brass made from .284 brass extracts just fine in both of these rifles.
Bob
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Legacy Member
Thanks for clearing up a bunch of misinformation from several people who did not know what they were talking about .
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Legacy Member
Been there, done that, no T-shirt.
When I got my K-11 about ten years ago, ammo was strictly a collectors thing. Lots of stuff is like that here in the Antipodes. The bulk GP-11 ammo that seems to have been briefly abundant in North America, came nowhere near her except in tiny lots.
So, having a few stray .284 Win cases, and fresh set of Lee dies, I went to work.
Formed and fired OK, primary extraction OK, HOWEVER, because of the rebated rim, ejection was "optional". Yes, it IS possible to "adjust" the extractor, but unless you are good with precision fitting techniques, give that a pass.
OK for plinking or very slow fire stuff, but not much fun during rapid or even "snap" matches. Eventually a source of Privi factory=fresh brass appeared, so I grabbed a couple of hundred. If the Privi cases are not readily available, 6.5 x 55 Swede is an option if you are keen on a relatively minor neck expanding and fire-forming exercise. 7.5 French cases are another option, also being very similar to their Swiss cousin. Unless you are running something belt-fed, a hundred cases will keep you busy and a spare hundred will contribute to a long shooting life.
One (universally applicable) caveat:
Because the case body of the 7,5 Swiss is fairly tapered, compared to "modern" designs, It tends to "flow", with neck-length growth apparent after even a few, "non adventurous" loading and firing cycles. This is no "bench-rest" chamber; the cases expand and when you FL size them, metal moves forward. Everybody reloading for any centre-fire rifle should own a case trimmer of some sort. (And actually use it).
None of the above is "rocket science". And a reasonable trimmer and associated gear is cheaper than a new rifle or a new set of eyes.
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Legacy Member
I just bought 100 7.5x55 cases from Grafs. No reason to make them from anything !
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