404 Jeffery – The Real Gunsmith

we're gonna talk about the 404 Jeffrey for for Jeffrey cartridge this is a this is a 404 Jeffrey virgin cartridge case I became interested in the 404 Jeffrey and various calibers built off of this back in about Oh back actually back in about 1980 or so but I didn't have I didn't have the time available until a couple of years later tell them about 1983 I developed several cartridges based off the former for Jeffery case and the 404 Jeffery case does not have a belt it's a little bit bigger case on the head then the Magnum case the Magnum case the dimer the rim is normally somewhere around about 535 31 the 404 Jeffrey case is 540 on the head just a head of a tractor groove the rim is also 540 this is a fairly large capacity case and anyway after having developed various cartridges off the 404 Jeffrey case a number of years later Remington came out with a line of cartridge called the ultra mags the seven millimeter the 300 and a 338 and the 375 ultra mags and right off the bat they claimed that this was based off the 404 Jeffery case well this is this is nothing short of a lie the 404 Jeffery case is 540 on the head a heavy extractor group the Remington alter cases are 545 that is a case that's five thousands larger than the 404 Jeffrey that makes it should be very evident that is not a fluorophore jeffrey case because it's a different size a chamber a chamber cut for a 404 jeffrey back here at the head about two tenths of an inch a head to the base of the case will measure 545 we can't put a remington 545 ultra case in a 545 chamber this should be quite evident but it's not evident to people that have said the main people that have said are our current crop of gun writers writing for all sorts of magazines that don't understand what they're talking about i think where this all started I think when a dog all begin somebody got a hold of a fired 404 jeffery case that was expanded back here at the expansion ring portion of the head which would have been expanded to 545 in a properly chambered chamber so they ran with that dimension stating that it was a 404 jeffrey and the ultra mag has never been based off the 404 jeffrey a chamber cut for the ultra maggot at that same place on the head 2/10 of an inch ahead of the base of the case as going properly chambered barrel is going to measure 550 well it should be quite obvious that we've got two different dimensions two different cases a 540 case of 545 chamber a 545 case of 550 chamber so everybody has mimicked everybody and said that it was a 404 jeffery the 300 ocher i want to make it abundantly clear that it's not a 404 Geoffrey Keyes and is something similar to it it's oversized now let's let's just take for instance for a second say that we want to make some cases for something based off the 404 Jeffrey this chambered for 404 Jeffrey chamber dimensions with a 545 chamber at the back end we can't put a $300 545 case in a 545 chamber it's not gonna work and it's not going to happen the Chamber's got to be 550 likewise if we take 404 Jeffrey cases I wanted to fire them to fit an ultra matte chamber these cases with a span now five thousand so over what they should be allowed to expand to 550 back here at the head this is excessive expansion back here at the head this should make it very of it but it doesn't seem to make it evident to people that are constantly constantly saying what I am repeating and repeating and I'm purposely repeating this because it's not based off the 404 Jeffrey this is totally nothing but missed information and I've been chambering rifles for almost any and every conceivable caliber since 1969 I've been chambering virtually anything dimensionally based off the 404 Jeffery since in 1983 and ever since the ultra mags came out I've been shaming for everything made on the ultra mag even Wildcats a lot of this stuff is Wildcats but we've got we've got a lot of a lot of different cartridge cases we've got a lot of different calibers that are based off the thirty-aught-six keys now you couldn't take a case that was five six thousand slardar back here at the head then the third yacht six case and claim that the case that you're using is based off the thirty off six case but that's exactly what's being done here and has been done with the older man expect relation to the former for Jeffrey I've wrote to several gun magazines never got answers back correcting these people seem to think that they have the in on the knowledge the experience and the real knowledge lies in the gun shops such as myself such as my my gun shop well this is what I do from day to day to day build rifles for all sorts of different chambers you have to understand all the technical aspects of this people that are writing about this and don't understand the technical aspects of it or they wouldn't be stating with their state so again I want to say this has to be put out here and corrected I get phone calls I get emails from people well I don't want this I want that you know I won't use sex offense based you know off the 404 Jeff vacation they're talking what they're really talking about is the ultra mag so I have to I have to try to explain to these people and since they've read misinformation that's a little bit hard to correct misinformation but that's what I'm doing here is correcting misinformation misinformation because in certain instances it could be considerably serious if we don't understand the full perimeters involved with using one cartridge case trying to form it to another cartridge case or one cartridge case you know fired in some other chamber that's not made for that case there are there are problems to be encountered with all these aspects so all these technical technical areas all these all these specific dimensions need to follow these dimensions many many years ago people were attempting to make 65 by 55 cases all for 30-yard six cases well that case is six thousand six to eight thousands larger depending on whose browser you buy then the 30.6 case well people people quick found out that their 30-yard circuit cases which were way way too small that were formed in a die and fired in a 65 by fifty five chamber actually expand this probably forty five years ago to people but that's not what you did that that was excessive expansion people caught on people caught on that long ago well we've we've come quite a ways since that point in time but evidently we haven't come very far because now we got and have had and continue to will continue to have gun writers that are mistaking what the ultra mag is based off and it's not off of the 404 Jeffrey case anymore than the than the 65 but fifty-five was based off of a 3006 case actually corrected that many years ago I'm doing the same thing I'm correcting this situation that as needed to have been corrected a good dozen or fifteen years ago when this stuff first came up but anyway that's that's what it is you

Channel: The Real Gunsmith

Views: 37,946

Rating: 4.8637772 out of 5

Keywords: randy's custom rifles, the real gunsmith, custom rifle, hunting rifle, long range rifle, long range, long range shooting, wild cat cartridge, 404 jeffery, ultra mag, target shooting, custom ammo, firearm history, load development

Id: t7ap8x2bNxc

Length: 10min 29sec (629 seconds)

Published: Wed May 02 2018