07 January 2004, 12:02
Gonzo FreakPower7 or 8x57 Mauser necked to 308 or 338?
I see lots of stuff about various incarnations of the 57 Mauser case. From 9.3, 9, 8, 7, 6.5 mm and the 257 Roberts there's lots of options with this case. Is there a good reason .308 and .338 are not part of this parade?
Would it make sense for someone with a shot out 7x57 to rebore and neck up all the cases? Seems like this would be a pretty economical way to recycle both rifle and brass. From 7 to 308 or 8 to 338 are small jumps so brass shouldn't be overly stressed and there should be enough barrel for the bigger hole.
Maybe these are too similar to other, more established cartridges to be redundant even for wildcatters if seen as a project from the ground up. But, would it make an old 7 or 8x57 with a bad barrel but otherwise in good shape a real bargain, especially if you happen to have cheap brass already available?
08 January 2004, 05:06
<eldeguello>NO good reason at all that I can think of. Why not try 'em? The .30/'06 should probably have been a 7.62X57mm instead!
08 January 2004, 15:50
OddballThe 30x57 has been on my mind for some time now. I think it would work better in a standard 98 mauser action than the 30-06. For some reason it has been passed over. Probably cause it's between the .308win and '06.
08 January 2004, 16:46
craigsterNeck the 7x57 down to 22cal. Add 1-8 or 1-9 barrel. This results in a 224 Clark. 80gr 22's @ 3400-3500. Now this is something worthwhile if you just gotta have a wildcat.
08 January 2004, 17:15
HobieDepending on case neck length it would probably duplicate the 7.65x54mm Argentine/Belgian...
08 January 2004, 17:58
Wildcat CrazyAny of the full length .444 based wildcat reamers can be used to cut a 57mm length chamber.
J D Jones has probably done so.It might be worth your time to check with SSK Ind.
WC
09 January 2004, 01:07
.338_lapuathe .338x57 has been done .338-57 O'connor I think, Sorry if I'm wrong (probably)BTW The 7X57 necked down was the .257 roberts and then the 6mm Remington which was again necked down, someone mentioned the .224 Clarke I've only ever heard of it as the .224 TTH (Texas Trophy Hunter) but then the .224 Clarke is probably decades older than the TTH
10 January 2004, 08:28
Wildcat CrazyI had forgotten about the .300 ICL Tornado.It was made by necking up the .257 Roberts,forming a false shoulder ,then fireforming .It has a shoulder dia. of .460,shoulder length of 1.80,and a shoulder angle of 53.35 degrees with a case capacity of 62.72 grs.of water.
Loading data {Ackley} 150 gr. bullet,52.0 grs.4350-2790 fps.
Ackley vol 1 page 424 or The Handloaders Manual of Cartridge Conversions page 337.
WC
11 January 2004, 19:51
Gonzo FreakPowerThanks for the info so far. Reason I brought this up is because if I ever run into an old 7 or 8x57 I would like to know I have some other options for it.
I would probably make most sense to take the 7mm to 8mm. But then what role does "sense" make on this board...
12 January 2004, 07:59
HondoJohn6508Following your line of thought myself a few years back, I have taken it one step further. I had reamers made for the 8x57MAI & 338x57MAI (MAI-Mauser Ackley Improved). Cases have been fire-formed but load development is going to have to wait as I am in the process of moving my shop from Hondo,Tx to Llano county, TX. If you are interested in either of these cartridges, send me a PM or an -e- and I will get back with you on their progress.
Best regards,
Ol' John