Anyone have any experience with either of these wildcats. Both will work nice in a mauser 98. The 8mm Mazon is the 9.3x64 case necked down to 8mm and will be very close to the capacity of the 8mm-338 only with a non belted case. The 8mm 376 Steyr is very similar only on the slightly shortened Steyr case.

Oh well, I guess I go it alone. I found a set of dies @ CH in 8mm Mazon or 8mm/9.3x64. Dave Manson can do a chambering reamer. So in a couple months I should have everything I need.

That sounds like a slick chambering round.
A couple down there's an 8x57 magnum.
That makes 3 very nice 8mm wildcats.

My dies arrived from CH today. Very nicely made I might add. Resized a box of brass and they worked very nicely. Can hardly wait for the reamer to get here.

Good to hear! Does your set include their crimp die? I use Barnes bullets and always crimp, in a separate step and preferably a specific crimp die.

quote:

Originally posted by .366torque:
Good to hear! Does your set include their crimp die? I use Barnes bullets and always crimp, in a separate step and preferably a specific crimp die.

No it is just the std FL size die and seater.

I was expecting a 10 to 12 week delivery time on the reamer and gauges. Was pleasantly surprised yesterday when I received an E-mail from Dave Manson saying the reamer and gauges had been shipped. That's 2 weeks since I ordered them ! I'm going to be shooting this rifle this fall.

Barreled action, reamer and gauges,and some test loads shipped to my gunsmith this morning. Hope to see it back in about 3 to 4 weeks .

Barreled action is now on its way home rechambered for the 8mm Mazon. A couple boxes of brass has been resized and ready to load. Biggest problem is hunting season is going to take priority over getting this thing shooting.

I have a nice 8x57 with a slightly large chamber that bothers me as its hard on brass..

I have been thinking a 8mm X 9.3x62 as the 9.3x62 cases are easy to come by, I like the PPU brass also, and its not expensive at all.

Open to any suggestions, but keep in mind that the 06 case probably wouldn't clean up the chamber..Another option is to send cases and my dies to RCBS and let them match the fired cases to my guns chamber....I can reload them as is but I have latterly stand and put all my 190 lbs on the press handle to resize them and that looks to shave brass a tad at the base.

Ray If your 8x57 chamber is oversized that can create a headache. Can you measure the base diameter on a fired case ? Just a quick check in the hornady # ten manual shows the 8x57 case as .469 "at the base the 30-06 is listed as.470" and the 9.3x62 case is even smaller @.467". So if the 06 case won't solve this I doubt the x62 will either. I would suggest re-chambering to the 8mm-06 Ackley Imp. Another option would be to re-chamber to the 8mm-284 Win. That WILL clean up the old chamber.

Do you have a ready source of 9.3 donor brass, in Canada, at an affordable price?

Snowman, you be dilexit, You done tripopulated,and underdilopidated the numbers,the base of a 9.3x62 is .476, a 06 case with a bump in the back, a hunchback of sorts!

9.3x62 base is .476 but the case head is .473 (that's good) but its a close call, but with my chamber it just might clean it up enough to work.

9.3x62 is .476

9.3x64 is .507

8x57 is .469

30-06 etc. are all .470.

Its real close on a 9.3x62, but I don't want a fat case but may have to go with a 8mm PMM that's a .338 case necked down to a 8mm, or a 7mm mag or .264 necked up to 8mm (323) and the 8mm mazon is optional..I do need to look at the .284, its in my book but does not give me .284 specs..

Every thing I have is pre .284 birth..

WOOKIE,
9.3x62 and 9.3x64 brass is easily available from Grafs and sons, and Midway, probably Cabelas also...It is Privi Partisan brass (PPU) and its the best brass in the world and its the cheapest in the world, $54.00 a hundred last time I bought.

quote:

Originally posted by Atkinson:
...
WOOKIE,
9.3x62 and 9.3x64 brass is easily available from Grafs and sons, and Midway, probably Cabelas also...It is Privi Partisan brass (PPU) and its the best brass in the world and its the cheapest in the world, $54.00 a hundred last time I bought.

Whoops, should've been clearer. Yes, I know about the very fine PPU, but as far as I know 9.3x64 is only RWS, or Captech/Jamison that's perpetually back-ordered.

After much hair pulling and tech reading, Ive found the .284 to be a good basic case and will clean up my chamber, alas with the hated rebated case, but that's no biggie to me and it never gave me an issue in the .284s Ive owned, and the 9.3x62 is just enough larger than the 06 to maybe work cleaning up this chamber..With that in mind, I will have to get my smith to do a chamber cast to be sure and go from there, hoping the 9.3x62 will work, otherwise the 284 or the 9.3x64 is in order. Ive been the 64 route a couple of times, and from time to time brass can be all but impossible and making brass from a .338 is a real pain require a lathe.

Ray I stand corrected on the 9.3x62 case size but I have to pass that off to the nice people @ Hornady. If you take a look in their volume 10 manual,go to page 700. You will see THEY have the base diam of the 9.3x62 case listed as .467". As for 284 based cartridges.I have several and they all feed just fine. If you wanted to get away from the rebated rim you could go to the 376 Steyr case. Not sure how available they are. The x64 case is so close to the 338 case performance is nearly identical. Just started loading my 8mm Mazon and I'm finding loads for it are almost identical as they are for my 8mm/338 (or 8mm Poor Mans Mag.). x64 brass can be made from 338 brass and it does require access to a lathe. I've found that Win brass converted has the same capacity as my x64 RWS brass. Good project on a cold winter day.

8-284 has a .044 step in the shoulder and .074 difference in OAL. An Ackley style set-back should do the trick.

8-284 Solids

quote:

Originally posted by Atkinson:
I have been thinking a 8mm X 9.3x62 as the 9.3x62 cases are easy to come by, I like the PPU brass also, and its not expensive at all.

Ray,
(not picking a fight here, or at least not trying to )
I think you'll have better luck with an 8x06 -- SAME DIMENSIONS as the x62 ... i think you mean x64 ... which is close to what the 376 steyr was made from .. it was made from 10,75x68 ..

so, there's basically zero difference in a 8x9,3x62 and an 8x06 ... okay, MAYBE "slightly" improved in moving the should .005 forward -- net .05 grains more water

BTW, an 8x376 is basically an 8x06 improved

Crappy weather up here but made it to the range today. Started shooting some test loads in the 8mm Mazon. Started with 195 gr Hornady's and IMR 4350 sparked by CCI250's. All loads were very consistant and POI very close for all loads tested. Worked up to 68 grs of 4350. Not max but this load was producing 1 in groups @ 100yds in blowing snow ! Feeding from the magazine is very smooth. I think I'm going to like this rifle.

Well after a conversation with RCBS, they said send the dies and perhaps we can match them to your chamber as it seems to be pretty close..Dennis Olson said he can grind them out and may or may not have to reharden them..So I sent them to RCBS to see what they can do. I would like to keep it original, its such a damn nice old gun and shoots bug holes even with iron sights..Its a 1943 Brno mod. 22F in large ring persuasion, very rare indeed, they used some left over actions when the kruts pulled out. It has all the proper markings, has a full intregal rib also, Has the brno bottom metal and its cut out for a single trigger with a short slot hole and its original!! The stock is exact. Its as rare as hens teeth and got all the quality as one expects from early round top Brnos, most of which are small ring.

RCBS beveled the entrance and polished the dies out and bingo, all is well, they slip through the die like poop thru a goose. RCBS rep said it was so close that they were able to easily correct the problem by ever so slightly beveling the entrance as it was not the rifles problem. Thanks RCBS..Its working perfect and will remain a 8x57 original rifle.