Gentlemen

I need somebody to help set my mind at ease here

I have about 200 Ruger 375 basic cases

Here's 3 of them

They measure about .532 at the base and about .530 at the top the OAL is 2.660+/-



So I ran 3 of them into my 404 J FL dies and produced these new cases, the base still measures .532 the shoulder now measures .529, it has the 8deg shoulder and the neck is plenty long enough, OAL case length has grown now to 2.680



The new Ruger case is .215 shorter than original the 404j case

But we all know the 404 Jeffery neck length is a very long .624, so my calculation indicate the neck on the new 404 Ruger J is approx .409, this is more than enough to hold the projectile

And here it is with dummy projectile



So the 404 Ruger J, fits into a standard length action and feeds floorlessly in my Ruger Hawkeye 300 win Mag action, you can use normal 404 J dies to neck and bump the gentle shoulder and seat projectiles

ALARM BELLS RINGING

Here's the thing....... There is only .003 taper, that's just too small

I'm thinking "if" I made a reamer with the base at .538 and the shoulder at .529 that could be enough ???

Yes, While I know I cannot open the bas webbing and a slight bulg is inevitable is having the chamber .006 bigger at the base too dangerous ???

My justification is, I know a few fellows using reformed 30-06 brass in their 9.3x62 and there is .006 difference in that circumstance, we are talking .003 per side is that dangerous ???, Ive also heard stories of virgin Lapua brass in 30-06 .005 under spec at the base

And I'm sure there are some sloppy factory chambers .005 to .006 bigger at the base

So I suppose what I'm asking, is this possible / viable ,

2ndly, what is the general rule of thumb on taper when wildcatting, what is the absolute minimum taper acceptable, is .008 - .009 thou taper over 2 inches enough ?

Thank you S&F

I have been wanting to do a 404/423 Ruger for some time...watching this thread....

Ed

I expanded the Ruger 375 case to .423 and made a couple of custom rifles for some gents. The loved them. Did same with the .416

I do not recommend making 9.3x62 cases from 30-06s, I know its done but its a poor practice at best, if for no other reason than it overworks your brass, but it also weakens the brass in that area.

I believe I have 4-5 boxes of basic brass (haven't looked in awhile) and a sampling (5 cases randomly selected from each box) gave me a base diameter average somewhere in the 0.528"-0.529" range; min @ 0.528" and max @ 0.531" (at least 2 lots of brass). I have it written down in my notes at home but I'm out on the road right now.

I wouldn't spec the reamer base any larger than the .375/.416 Ruger SAAMI base specification.

Maybe the 358 STA and 450 Ackley give a clue.

From memory they are .505 on the shoulder as compared to the .480 to .485 or thereabouts on stand belted magnums.

A really parallel case like you are describing would probably be OK as long as the rifle had long primary extraction such as M70 and M98 and minimum gap between extractor and case rim. Too big a gap will waste some of the primary extraction.

S&F,

Regarding using 30-06 cases to form 9.3x62 cases...
This was primarily done when 9.3x62 cases were as scarce as hens teeth and extremely expensive when found. Conversely, 30-06 cases were available everywhere and very cheaply as well and while not optimum, their use did allow 9.3x62 owners to use their rifles. Today this is not common practice due to the availability of quality 9.3x62 brass at a very reasonable price.

Regarding blowing out the base of the 375 Ruger Basic brass...
There was a thread on the forums - either 2014 or 2015 - where a member discussed his sojourne in progressively blowing out 375 H&H belted brass to fit the 404 Jeffery chamber. This however was not done due to the unavailability of the Jeffery brass but because the member had a lot of the belted brass.

Basically falls into the category of shooter/reloaders beware...

Capoward,
you would be surprised how many still use 06 brass to make 9.3x62s..even on this board. Like you said I used 06 brass for a number of years back in the 50 and 60 as I had a wonderful JP Sauer in that caliber..brass lasted about 3 to 4 loadings as I recall, then I started annealing between two loadings and it lasted real well, that made a big time difference.

PPU sell wonderful 9.3x62 brass (Graffs) for less than 30-06..PPU (privy partisan) brass last forever it seems..

The 400 Whelan is supposed to have a shoulder of .458" and base of .473, giving a taper of 0.015 over ~2 inches; that is the least amount of taper I would use designing a cartridge.

That is a damn fine looking round.

I was looking into a .458 Ruger for a while but did not have the nerve as of yet.

I still have an extra Ruger .416 Alaskan sitting around.

Now Noslers causing all kinds of trouble with their new .30 Nosler.
Seems like they are going to keep moving up the ladder.

Now if you take that case and turn it into .458 you have the old .450 G&A
(.460 G&A short).

I would be more tempted to do that to give a companion to my .460G&A.

at .458 . well, it would be larger than 458 winmag, smaller than a lott. the case is .532, the ga is .545 and the accrel is .550 --

short and fat already has a 458 accrel!

quote:

Originally posted by Atkinson:
Capoward,
you would be surprised how many still use 06 brass to make 9.3x62s..even on this board. Like you said I used 06 brass for a number of years back in the 50 and 60 as I had a wonderful JP Sauer in that caliber..brass lasted about 3 to 4 loadings as I recall, then I started annealing between two loadings and it lasted real well, that made a big time difference.

PPU sell wonderful 9.3x62 brass (Graffs) for less than 30-06..PPU (privy partisan) brass last forever it seems..

Ray,

It really doesn't surprise me that many are still forming their 9.3x62 brass from 30-06 brass. It is kinda crazy with the low cost of the Prvi brass - but to each their own...

Capoward,
Not to mention that if I intended to make 9.3x62s out of 30-06 brass I would probably make it a 9x3x30-06 IMP Wildcat, but I won't I like the 9.3x62 as it is real well and the brass that's a cheap as 30-06 and lasts forever and is in stock at Midway and Graffs..Love that PPU stuff in all calibers btw .