Tight Squeeze
- Thread starter Gatehouse
- Start date
Thankfully its pretty hard to go the other way.I want some ammo for my 300! It's a Savage!
The really strange part of this story is that one really needs to try hard to get a 7X57 to chamber in a 270 Winchester. Try it and see. Even with the most pointed spitzers there is still enough 7mm neck that must be jammed into the 270 chamber.
Ted
Ted
This is called fireforming and I do it all the time. Zero harmful effects to the rifle firing smaller bullets down a larger bore, after all they are still only guilding metal and lead. I have made several hundred 375 Ruger cases by firing 300 Win mag in a 375 Ruger chamber. I have also made hundreds of 30-06 firing loaded 270 from an 06 chamber, 7mm RM by firing 264 WM and on...and on... and on...
BigUglyMan
CGN Ultra frequent flyer
- Location
- New Scotland
You missed the original thread. It worked out quite nicely. Apparently made better brass than the factory 375 Hornady brass. Irons the belt right out. The case body width of the 375 Ruger is the same as the belt diameter on the standard belted magnums.
- Location
- Southern Vancouver Island
An amigo of mine was sighting his .308 Remington in a couple of years back and was wondering why the group was much larger than expected with some bullets hitting the paper sideways. Turned out he had some .243 ammo in his pocket mixed in with the .308 stuff.
No harm done & all he did was fire form some .243 brass to .308, but with more powder than normally used. Was fun to watch though.
No harm done & all he did was fire form some .243 brass to .308, but with more powder than normally used. Was fun to watch though.
Very interesting, not listed in The Handloaders Manual of Cartridge Conversions by John J. Donnelly as the 375 Ruger is too new.
Give it up.... Not everything is listed in some manual....... And first hand experience trumps all......
I am a novice reloader and am taking things slow, but even I can see your agenda here...... Pathetic......
First hand experience! I don't of the luxury of living 1000 years to experience everything on my own, therefore, consult published manuals, scientific papers etc to gain knowledge as well as personnel experience.
This is one that I have not heard of as I do not shoot a 375 Ruger nor have issues sourcing 375 Ruger brass.
So asked a question to generate conversation, post #26 helped.
Post #29 did not.
In 2010 or so, bam bam made 375 Ruger cases by necking up 300WM cases then fireforming. Whynot and medeveq did something similar a few years later, and cfbmi just shot 300WM ammo in the Ruger. The brass expands and the belt irons out.
I just use the readily available 375 Ruger brass, as I try to avoid fire forming these days....one of the reasons I tend to choose cartridges that it is easy to find brass for.
Actually Gate, what I did was significantly more extensive than just firing 300 WM in a 375 Ruger. I also do not recall Ted or Phil (both of whom I know personally) ever doing anything with the 375 Ruger or attempting to make beltless cases from belted cases. I assume what you are talking about is making 9.3X62 from 06 brass, by over necking and then necking back down to create a shoulder in the correct place to headspace on.
My experiment included firing 300 WM cases as is, but it also included necking up and fire forming as well as annealing and fireforming. It also included 7 maximum loads in a single W-W case to determine potential case life and see if the case would fail at the belt/body junction. Which I might add it did not and the primers were still tight after 7 loads. I then sectioned the case to inspect it for incipient case separation and/or fractures at the belt/body junction. I then weighed cases from factory Horn 375 Ruger and my fireformed cases as well as doing a volumetric comparison.
But ya all I did was fire some 300 WM in a 375 Ruger................As to your last line, I must commend you on knowing your limitations and staying within them.
My experiment included firing 300 WM cases as is, but it also included necking up and fire forming as well as annealing and fireforming. It also included 7 maximum loads in a single W-W case to determine potential case life and see if the case would fail at the belt/body junction. Which I might add it did not and the primers were still tight after 7 loads. I then sectioned the case to inspect it for incipient case separation and/or fractures at the belt/body junction. I then weighed cases from factory Horn 375 Ruger and my fireformed cases as well as doing a volumetric comparison.
But ya all I did was fire some 300 WM in a 375 Ruger................As to your last line, I must commend you on knowing your limitations and staying within them.
BigUglyMan
CGN Ultra frequent flyer
- Location
- New Scotland
And, to the best of my knowledge, his #### did not drop off.
Did the formed case have a 'line' at the belt/body juncture?
Sorry, I forgot how delicate your ego is.
Yes, I know that you took other steps but when I said you "just" fire form them, I was talking about how you finally decided on a simplified method, and JUST was the word you used to describe it:
You may know Why Not and Medevdq personally, but they did indeed make 375 Ruger cases from 300WM and had s thread here on it.
Fire forming is pretty straightforward. I've done it using several methods. I just choose to spend my time on other things these days, so avoid cartridges that require extra work to create brass. It's not that I don't find the process interesting, it's just that it takes time I don't want to spend.
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BCBRAD...........
This is a factory 300 WM...fireformed (first firing) 300 WM and factory 375 Ruger
A close up of the fireformed case, the belt is still quite prominent but the body is blown out.
Here is the sectioned case after 7 firings at MAXIMUM loads, the belt is almost entirely assimilated into the case and as is obvious there is no fracturing at the belt/body junction or thinning in the web area
Top is a new unfired 300 WM, then an annealed and fire formed 300, then a 300 after first fireform load (unannealed) then bottom one was necked up and fireformed using a 375 bullet. To the right are the 2 sectioned cases and a factory 375
Ruger.
So to answer your question BCBRAD, the belt always remains visible but after several firings you can just barely hook it with your finger nail, and for all intents and purposes is completely assimilated.
This was done exclusively with W-W brass for the fireforming work.
This is a factory 300 WM...fireformed (first firing) 300 WM and factory 375 Ruger
A close up of the fireformed case, the belt is still quite prominent but the body is blown out.
Here is the sectioned case after 7 firings at MAXIMUM loads, the belt is almost entirely assimilated into the case and as is obvious there is no fracturing at the belt/body junction or thinning in the web area
Top is a new unfired 300 WM, then an annealed and fire formed 300, then a 300 after first fireform load (unannealed) then bottom one was necked up and fireformed using a 375 bullet. To the right are the 2 sectioned cases and a factory 375
Ruger.
So to answer your question BCBRAD, the belt always remains visible but after several firings you can just barely hook it with your finger nail, and for all intents and purposes is completely assimilated.
This was done exclusively with W-W brass for the fireforming work.
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Johnn Peterson
CGN Ultra frequent flyer
- Location
- Chemainus B.C.
X2 Douglas. Appreciate your time, effort and expertise.
