9.3x62 for 9.3x57 brass
- Thread starter Hmatt
- Start date
I’m hoping for decent results. This rifle is in fantastic condition, bore like glass stock is beautiful, 80%+ bluing on exterior
Still.
There is going to be a bit of an issue with case length. When I resize 30-06 to make 9.3 x 62 I have to trim approximately 1mm off the end of the case; if you are doing this for 9.3 x 57 you will have to trim your cases about 6mm. That is a lot.
I am thinking about trying to run a 30-06 through my dies after trimming it down as mentioned just to see what happens.
It works. I have used 30-06 to make 9.3x57 and 9.3 x 60 brass. - dan
Case capacity is so close (slightly larger than 358 win) to 358 winchester that 358 winchester data can be used.
Download a Gordons Reloading Tool - it is an incredible resource for reloading -better than quickload.
There is a learning curve with GRT but it is worth the time to learn.
I shoot 200 grain powder coated Gas check cast bullets for fun.
I have used 4064 and WC735 (Surplus similar to H335)with good results.
If you have M-98 action you can push pressure and velocity up, If you have the Model 96 Husqvarna then folks advise to keep pressures down to 42,000 cup.
I also swage 200 grain 0.376" jacketed bullets to 0.367" and use them with 4064 with excellent accuracy
I have made some cases from 8x57 but most from Remington 30/06, Remington 270Win, and 25/06.
I anneal, trim the case to 58mm, expand the neck to 0.420" then size in the 9.3x57 die, then do a final trim to 57mm
I modified a Lee 8x57 case length gauge to 9.3 caliber and use a drill press to trim to length.
I turn case necks with a forester neck trimmer.
I check velocities of loads with a chronograph and they reconcile very nicely with the data created by GRT.
I have yet to have a pressure issue or extraction issue, or chambering issue.
You are going to like the 9.3x57
I haven’t done any done any resizing yet. I got quite a bit of ready to go brass, half of it being 1F 8x57 resized to 9.3x57 the rest factory Norma 9.3x57 1F
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Is the 7.62x57 really a thing? How did they do it?
Neck up 7x57 brass to 30 cal. - dan
Fair enough, didn't think about doing that and why.
- Location
- Western Manitoba
Not precisely the same as necking 8x57JS down to 30 cal. 7x57 is about .4294" at shoulder - 1.7277" to bolt face. 8x57 is .4310" at shoulder - 1.8273" to bolt face. Both have same size case rim, I think. Very close, if you see 0.0966" as insignificant case body length difference, but they are / were different to each other.
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I like this.
Is this outperforming the 7.92x57 by any way?
What's the head stamp on the brass you modified?
Thank you in advance.
dgradinaru
CGN frequent flyer
- Location
- British Columbia
It's not supposed to be better than other cartridges. Wanting something different could be the sole reason. If I recall Hoytcanon is running 180gr BT at over 2700 fps. Falls between the 308 and 30-06, and actually beats 30-06 factory loads (most 30-06 factory 180gr loads chronograph at 2650-2700 fps). I think its a beautiful and well balanced cartridge. I am one of the few that has one thanks to Hoytcanon.
^^ Having something different is nice.
If one doesn't want to go thru the troubles I would have thought simply downloading the .30-06 would bring the same results in performance since it has a bigger case capacity than the 7.92x57.
If one doesn't want to go thru the troubles I would have thought simply downloading the .30-06 would bring the same results in performance since it has a bigger case capacity than the 7.92x57.
With that theory we would only have half a dozen cartridges. My reasoning for it's creation was a fondness for the X57 case, and a plethora of .30 cal bullet options. It was odd that there never was a commercial X57 .30 cal cartridge. In addition this nestles in nicely between the .308 and .30/06, and provides a resolution to the age old debate between the two cartridges, although it is closer to .30/06 in performance. As for trouble, it is 8X57 passed through the sizing die, no extra steps to arrive at a cartridge. I am getting 2740 fps with 180 NBT's and Alliant powder and it has a very pleasant recoil cycle. I have taken half a dozen animals with it including deer, bear and moose with excellent terminal performance. I am using PPU 8X57 brass which is easy to come by and inexpensive. I currently have two rifles chambered for 7.62X57, a Walnut Blued M77 Mark II and a Stainless M77 Mark II with Bob Jury barrel. In the picture below top to bottom; M77 Mark II .450 Marlin, M77 Mark II 7.62X57 HC, M77 Mark II .358/375 Ruger, all with Jury barrels, B&C stocks and Leupold scopes.
