Author Topic: How did we live through it?  (Read 76 times)

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Offline northwoodneil

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How did we live through it?
« on: February 20, 2021, 08:24:57 AM »
I just bought a box of books at an auction and in the bottom of the box was load data for the "O'conner steelhead " rifle casings. I have never seen or heard of them. Basically a steel cartridge case head with a screw on brass sleeve you would fire form. One load (30-06) called for a 147gr spitzer, CCI BR2 primer, and a duplex load of Herc. Hi-vel #2 (49.6gr) and Hodgdon H570 (5gr). Checks out like this 3,409 mv 81,700 psi. :o Same bullet and primer use 59gr Norma 202. Mv 3483 93,100 psi :o :o  That's 1 1/2 times sammi pressure.
I won't be wronged. I won't be insulted. I won't be laid a-hand on. I don't do these things to other people, and I require the same from them.

― John Wayne "The Shootist"

Offline Land_Owner

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Re: How did we live through it?
« Reply #1 on: February 20, 2021, 10:50:47 PM »
It is a testament to the strength of materials and Safety Factor!  Those pressures probably put their chambers and barrels into permanent deformation, or those guns weighed 39 pounds each and were "difficult" to shoulder.

It is a wonder that ANY of us made it through our formative years with the carp we tried, stunts we pulled, near misses we never saw.  Some didn't.  Natural Selection maybe?

Offline Bob Riebe

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Re: How did we live through it?
« Reply #2 on: February 21, 2021, 06:04:46 AM »
I have heard of such cases in my readings.

The pressures used sixty - seventy years ago, were back when many -- what if -- loaders would go by what info they had and then try more.
I read often these gents looked for sign of excess pressure but even at that some common loads in hand loading manuals were near the edge.
It might not blow-out a firearm, but continual use of it would wear the firearm out at a greatly increased rate.

I have for loading my Smith & Wesson Model 25 that had loads of well, well over 1,000 fps.
I bought a bag of .45 Auto Rim handloads at a gunshow thirty years ago, with heavy bullets; the recoil equaled .44 Mag. hot loads.
I am sure if you search long enough you can find some of Casull's triplex loads, while early J. LInebaugh's five-shot .45 loads are very high pressure rounds.

Offline sr sawyer

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Re: How did we live through it?
« Reply #3 on: February 21, 2021, 06:07:25 PM »
Early 1980"s O'Connor Rifle products,  Charleston, SC  Introduced the steelheads and I think they would have done well had the cost been more competitive  for the current time period.  I did a fair amount of research on this and the weakest part of the load is the case head
 
There was a lot of research on rifle actions and the and pressures they will with stand and all this info is probably on line  as it was in print when the Steel Head  was first introduced.

I currently have two five count boxes collecting dust for the magnum caliber.  Bought these for the 300 Weatherby only to discover I would need a
.35 or .75 die to begin the proper neck sizing so they sit for 35 or so years. 

So much for progress.

Ken
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Offline northwoodneil

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Re: How did we live through it?
« Reply #4 on: February 22, 2021, 11:08:02 AM »
I went and looked for loading data on the 300 Weatherby but only 30-06 listed on my sheets. This is most likely the caliber whoever had these purchased so thats what O'conner included. I'm still wondering how the primers didn't rupture? Would magnum primers take these kinds of pressures?
I won't be wronged. I won't be insulted. I won't be laid a-hand on. I don't do these things to other people, and I require the same from them.

― John Wayne "The Shootist"

Online orerancher

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Re: How did we live through it?
« Reply #5 on: February 22, 2021, 12:38:35 PM »
I went and looked for loading data on the 300 Weatherby but only 30-06 listed on my sheets. This is most likely the caliber whoever had these purchased so thats what O'conner included. I'm still wondering how the primers didn't rupture? Would magnum primers take these kinds of pressures?

Magnum Primers will blow just as easy as Regular Primers....

Didn't PO Ackley say Load till Ya Blow a Primer...Then Back off a Grain?