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How challenging is it to load this cartridge? A friend has an old combination gun in this caliber. How can the brass be made?
Thanks,
KC
Thanks,
KC
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If you mean 8x57R, Buffalo Arms has Norma cases. -
Not more difficult than loading most other cartridges and easier than many. First, slug your barrel to determine if it is a 8x75R (.318" bullets) or a 8x75RS (324"). Get proper dies from CH4D or RCBS. Get new 9.3x74R cases. Resize. The DEVA "Wiederladen" reloading handbook list no less than 31 pressure tested loads for the 8x75RS Behr cartridge. Cases will slightly fireform on first use.
The more frequent 8x72R is a different story of course, as 9.3x72R parent cases and .318" bullets are more difficult to find nowadays, resizing to the tapered shape is more difficult and the results, weak American "8mm Mauser" ballistics, less rewarding. DEVA has only 8 lods for 198 gr bullets.Comment
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kcordell,
My modem has been out, hence the late answer. Axel is,of course,right.While waiting for dies, you can size 9.3x74R cases in 8x57 or 8x60 sizing die until it will chamber( do this by eye since the die will be too short. you may have to set the sholder back more than normal, to get it to chamber). Once the cases will chamber, fireform them with a light load of fast powder with a 1/4 sheet TP tamped over it, fill with cornmeal/grits/cream of wheat, stopped off with another 1/4 sheet TP. Once fireformed, your friend can set the sizing die to just "kiss" the shoulder and use it as a "neck sizing die to load a few rounds while waiting for dies. This way, though, the dies have to be set up by eye, and the shell holder won't reach the bottom of the die. Once the case is fired at close to normal load with a bullet, it will perfectly fit the chamber. If the diemaker asks for fired cases, these would be the ones to send.
If it is 8x72R as Axel mentioned, size 9.3x72R cases in 32-40 file trim die until it will chamber and fireform as above. I've had my 8x72R for 12-15 years and still load it with 8x57 dies as above. To use these dies with .318 bullets, just remove the expander assy. and deprime by hand with a "shop made" depriming punch.
I hope this helps.
MikeComment
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kcordell,
My modem has been out, hence the late answer. Axel is,of course,right.While waiting for dies, you can size 9.3x74R cases in 8x57 or 8x60 sizing die until it will chamber( do this by eye since the die will be too short. you may have to set the sholder back more than normal, to get it to chamber). Once the cases will chamber, fireform them with a light load of fast powder with a 1/4 sheet TP tamped over it, fill with cornmeal/grits/cream of wheat, stopped off with another 1/4 sheet TP. Once fireformed, your friend can set the sizing die to just "kiss" the shoulder and use it as a "neck sizing die to load a few rounds while waiting for dies. This way, though, the dies have to be set up by eye, and the shell holder won't reach the bottom of the die. Once the case is fired at close to normal load with a bullet, it will perfectly fit the chamber. If the diemaker asks for fired cases, these would be the ones to send.
If it is 8x72R as Axel mentioned, size 9.3x72R cases in 32-40 file trim die until it will chamber and fireform as above. I've had my 8x72R for 12-15 years and still load it with 8x57 dies as above. To use these dies with .318 bullets, just remove the expander assy. and deprime by hand with a "shop made" depriming punch.
I hope this helps.
MikeComment
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Guys, this is good information. It is 318 8x75r. Are you sure it he parent case would be the 9,2x72r? Just checking... May be a bit to advanced for him to load...Comment
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Kcordell, we are talking about two entirely different cartridges:
The 8x72R, parent case the slim 9.3x72R
and the 8x75R, parent case the fatter and longer 9.3x74R.
confusing the two may lead to desaster! It is like mixing up loading data for the .280 Remington and the 7mm Remington Magnum. Here too we have two different cases, both using .284" bullets and of approximative the same length, but nothing is interchangeable. So, First determine what you really have, an 8x72R or an 8x75R!Comment
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kcordell,
Don't let your friend become discouraged and decide not to load for his rifle, thinking it's too advanced for him. As Axel said, once cases are fireformed, it is just like loading any other cartridge. It seems you have positively ID'd it as 8x75R(.318), so just file my comments about making cases for 8x72R in the back of your head. I didn't intend to confuse matters.This is a powerful and very good cartridge that is very worthwhile to load for. Just like the 8x57IR/8x57IRS, some rifles made for the .318 dia. cartridge may safely accept the larger bullets. If a .323 bullet will easily slide into a fired and not resized case, they can be used. This would also be true of the .321" 32 Win Spec. bullet, but they are made for a much lower powered cartridge and would be too violent, except in very modest loads. Remember, it wouldn't be fun if you could just go to the Wal Mart for ammo.
MikeComment
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The gun is a Collath and is marked 8x75 so I can only assume .318. Looks like a long tapered shell. So what do you think?Comment
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I think you better do a chamber cast and make it long enough to extend into the bore 2-3 inches then mic the casting for chamber dimensions and bore/groove dimensions. One of your posts says it is an 8 X 75R and is .318 then the last one assumes. Preparing to and actually reloading for an old rifle is not the place to assume anything...bad stuff can happen.Comment
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kcordell,
Since you said the rifle is a Collath, I'm a little bit apprehensive about it being an 8x75R. When you make the chambercast, per sharps4590, if the head diameter is around .468-.473", use the 9.3x74R brass. If it's around .426-.429", then use 9.3x72R brass; unless you insist on full length cases, in which case buy expensive 9.3x82R cases.
MikeComment
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Actually, I have a Collath in 9.3x82r nimrod but can't seen to find the Bertram cases anywhere. Does anyone have a good source?Comment
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kcordell
A late friend bought his from Midway(some years ago),I think I would try Buffalo Arms or Graf.
MikeComment
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You might try Horneber. Of course, the trick is to get them here. http://www.huelsen-horneber.de.Comment
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I believe I bought my 9.3 X 82R from Graf's but they are out of stock right now. Midway says they have some.
http://www.midwayusa.com/product/720...mmed-box-of-20
Buffalo Arms says they have "ample stock"
https://www.buffaloarms.com/93X82R_R....aspx?CAT=3831
All three, Graf's, Midway and Buffalo Arms are about the same price...expensive....but waddya do?Comment
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