284 wildcat
- Thread starter grovey
- Start date
Probably, but I’ve yet to learn of one.
There’s a pair of wildcats built on 308 cases with shoulder moved forward ~ 3mm though, Robert Chombart’s 260INCH and 284INCH concept. Leaves very little neck to hold bullets, but work very well!
I built a 284INCH early in 2016 for NRA Prone long-range events. In its first competition outing in June that year I tied the existing Any Sight (I was shooting match sights!) 1,000 yard 20-shot Senior National Record with a 200-15x score. David Tubb broke it this year at Atterbury shooting his new design rifle shooting 6XC, 200-16x.
There’s a pair of wildcats built on 308 cases with shoulder moved forward ~ 3mm though, Robert Chombart’s 260INCH and 284INCH concept. Leaves very little neck to hold bullets, but work very well!
I built a 284INCH early in 2016 for NRA Prone long-range events. In its first competition outing in June that year I tied the existing Any Sight (I was shooting match sights!) 1,000 yard 20-shot Senior National Record with a 200-15x score. David Tubb broke it this year at Atterbury shooting his new design rifle shooting 6XC, 200-16x.
17VLD
Gold $$ Contributor
I remember a fellow at the Varmint Hunter jamboree that was named Todd
He called it the Toad,a bit of work but it was accurate at 600 yards,his was necked to 6mm.Perhaps Terry here will remember some of the details about that cartridge,sure was a nice guy from the Midwest,he was friends with a custom bullet maker named Don Lahr,which I am sure helped with his good 600 yard scores.Good article in one of the VHA issues about it.
Matt
He called it the Toad,a bit of work but it was accurate at 600 yards,his was necked to 6mm.Perhaps Terry here will remember some of the details about that cartridge,sure was a nice guy from the Midwest,he was friends with a custom bullet maker named Don Lahr,which I am sure helped with his good 600 yard scores.Good article in one of the VHA issues about it.
Matt
Kurz
Silver $$ Contributor
It was probably '94 when I was working on the .284 case to achieve 6.5x284 cases for competition. Several of us would intermittently 'round table some discussions about brass forming and new cartridges. I was reading about the guys using cases with less powder so I started shortening the .284 case until I got to somewhere around 1.800" to 1.900"+/- for approximately 50 grains of water capacity. I think I made about 50 cases probably and used them for testing for a few weeks until I got busy working on something else. Yes it was accurate and yes it was excellent at the 600 yards line.
I was queried by Larry Bartholome regarding shortening this case so I gave him a run down on the production and some results. Supposedly he made an attempt with this design but I never got any further details that I remember.
I never bothered to name it because I do dozens of case modifications for my own edification not notoriety. It's a fun activity which keeps me thinking...
I was queried by Larry Bartholome regarding shortening this case so I gave him a run down on the production and some results. Supposedly he made an attempt with this design but I never got any further details that I remember.
I never bothered to name it because I do dozens of case modifications for my own edification not notoriety. It's a fun activity which keeps me thinking...
thekriebles
Gold $$ Contributor
As mentioned above, there's the 6mm Toad which is approx. 1.8975" and the 6mm-284 MADD II which is approx. 1.92" in length. Here is a photo comparison, left to right: 6 Dasher, 6 Toad, 6 MADDII, and std. 6.5-284 Win.:
I give you the 284 Grail......................
I have been holding on to this on for a while and not sharing but since someone finally asked here you go. Its a 284 case pushed back about .190" and the shoulder changed to 30deg, case wall is straightened just a bit, think shehane. Case is 1.98" and holds 60.0gr of H2O. So far i have only really played with a 175gr berger. I am pushing them at 2790 in a 24" barrel. Admittedly they do load a little long at 2.92" but i dont think anyone here is running a wildcat in a factory action. Been working on this little project for years, I love the 284 bullets but refused to believe that they needed to live in a long action or a magnum. I run them in a 12lb rifle and the recoil is not that much more then my 6.5 Creedmoor. It's been a fun little project and i love the round. Only downside is the brass is a total PITA to make, but hey its a wildcat.
I have been holding on to this on for a while and not sharing but since someone finally asked here you go. Its a 284 case pushed back about .190" and the shoulder changed to 30deg, case wall is straightened just a bit, think shehane. Case is 1.98" and holds 60.0gr of H2O. So far i have only really played with a 175gr berger. I am pushing them at 2790 in a 24" barrel. Admittedly they do load a little long at 2.92" but i dont think anyone here is running a wildcat in a factory action. Been working on this little project for years, I love the 284 bullets but refused to believe that they needed to live in a long action or a magnum. I run them in a 12lb rifle and the recoil is not that much more then my 6.5 Creedmoor. It's been a fun little project and i love the round. Only downside is the brass is a total PITA to make, but hey its a wildcat.
I bet you want somebody to say - Holy Grail!
LOL, well that is where i got the idea. It was here on this site many years ago that people were talking about the Holy Grail of 7mm and it seemed as though no one could agree on something so i came up with mine. That and there's a million 7mm rounds out there so i thought 284 Grail was cooler. The only problem is the brass is stupid hard and labor intensive to make. Its not your standard neck up/neck down wildcat.
thekriebles
Gold $$ Contributor
Here are the primary forming steps for the 6mm Toad (far right) using 6.5-284 Win. Lapua brass from '08/'09:
thekriebles
Gold $$ Contributor
Likely longer... I'd have to re-read the article. I believe there were at least 20 steps to forming the brass for the Toad.
billbonser
Gold $$ Contributor
I designed and had a reamer made for 284X1.5 (284 by inch and a half) about 35 years ago. There was one XP-100 chambered and built to shoot handgun silhouettes. It shot like gangbusters. -BUT- The cases were so difficult make we gave up on the the project. This was about the time Remington made the 7mm Remington BR. The 308 by inch and a half had already been done. Unfortunately I lost track of that reamer, I still like the idea.
This was a time when we were trying to optimize powder burning in a 16" unlimited gun barrel. A friend of mine, Mike Mc Elroy, built and shot a 458 by 1.5" earning him the name" Earthquake Mc Elroy". Wildcats were everywhere on the handgun silhouette range. The 7mm IHMSA based on the 300 Savage case was very popular. Variations of the IHMSA were 25, 6.5mm, 270, 30, 338, 8mm, and 35 cal. The now 6.5 Creedmore is very close to the 6.5 IHMSA with a different shoulder. I shot, and still have a 30 IHMSA unlimited XP. I did chamber and shoot a 284 FL 16" unlimited XP for a couple of months, but it was not practical, I still have the barrel.
This was a time when we were trying to optimize powder burning in a 16" unlimited gun barrel. A friend of mine, Mike Mc Elroy, built and shot a 458 by 1.5" earning him the name" Earthquake Mc Elroy". Wildcats were everywhere on the handgun silhouette range. The 7mm IHMSA based on the 300 Savage case was very popular. Variations of the IHMSA were 25, 6.5mm, 270, 30, 338, 8mm, and 35 cal. The now 6.5 Creedmore is very close to the 6.5 IHMSA with a different shoulder. I shot, and still have a 30 IHMSA unlimited XP. I did chamber and shoot a 284 FL 16" unlimited XP for a couple of months, but it was not practical, I still have the barrel.
Attachments
"grovey" -
Howdy !
For info:
I formed some sample 6mm wildcat cases, on .284Win case shortened to 1.71" .
The wildcat was the idea of a Virginia High Power shooter, who questioned whether the short/fat
wildcat would hold even 42gr of sample D-85 ball powder.
The case held 42.6gr unfired, and had a mechanically-formed but unfired shoulder angle of 27*.
The final shoulder angle was intended to be 30* .
The shooter envisioned campaigning the wildcat "Across the Course", using fairly inexpensive
6mm bulk bullets. He decided not to proceed, citing concerns about use of the wide and rebated rim case in an
AR format.
With regards,
357Mag
Howdy !
For info:
I formed some sample 6mm wildcat cases, on .284Win case shortened to 1.71" .
The wildcat was the idea of a Virginia High Power shooter, who questioned whether the short/fat
wildcat would hold even 42gr of sample D-85 ball powder.
The case held 42.6gr unfired, and had a mechanically-formed but unfired shoulder angle of 27*.
The final shoulder angle was intended to be 30* .
The shooter envisioned campaigning the wildcat "Across the Course", using fairly inexpensive
6mm bulk bullets. He decided not to proceed, citing concerns about use of the wide and rebated rim case in an
AR format.
With regards,
357Mag
The 7-08 AI makes way more sense time and money wise, but stuffing it in 700 s/a to be fed from the magazine is the issue. A Tikka would be the answer. You'd probably need the L/A bolt stop and mag.
GSPV
A failure to plan is a plan for failure.
I’ve been shooting a 7x47L for several years. I really like it. Think of it as a scaled up 6 BR with all the good qualities inferred. I can shoot from 100 grain flat base up through 168 grain boat tails with reasonable jump or jam, with the pressure ring of the bullet above the donut, and with the COAL inside an AI mag. It actually turns out to be a fairly tough set of requirements to meet. I played around all of one winter to figure it out.
When I spec-ed the reamer, 6.5 Creedmoor SRP brass wasn’t available, I might have necked it up. I haven’t gone through the same 3 requirements with the CM case.
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.450 Bushmaster.
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