a pair of weeks ago I've seen a reamer for this caliber, any info on it?
Thank you in advance

I love the little calibers

Steve

I am listening

Tell me more

I am intrigued.....

Are you perhaps referring to the 243Hornet? Here is a link with some information about this cartridge.




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.243 Hornet

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History/Description
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About AmmoGuide Case Diagrams
NOTE: The below shoulder angle is an estimate based on the provided shoulder geometry.




Standard American S.A.E. (in.)
Metric Metric (mm.)

.243 Hornet at AmmoGuide.com
SPECIFICATIONS

Bullet Diameter:
.243 in.

Rifling Twist:
1-in-14.0 in.

Case Capacity (est):
16.3 gr. water

Primer Size:
.175 in.



NOMINAL PERFORMANCE

Bullet Weight:
60 gr

Muzzle Velocity:
2700 fps

Muzzle Energy:
971 ft-lbs

.243 Hornet at AmmoGuide.com

.243 Hornet at AmmoGuide.com

"Easy Link" to this cartridge (copy and paste into emails, forums, etc.):
.243 Hornet - http://ammoguide.com/?catid=630



The .243 Hornet was created by the late Dale Schram in the early-to-mid 1950's by necking up and improving the popular .22 Hornet. It was chambered in a Browning Low Wall, that has not been located since he passed away. All of the dimensions were taken from a sketch found with his rusting chamber reamers, load data, and bullet moulds. Unfortunately, it is impossible to list any load data because the powders he was using is not distinguishable in his records.

Velocities listed in his records are probably fantastic or unsafe (several list what are assume to be cast bullets traveling around the 3000 fps mark!) as a chronograph would not have been accessible to him at the time. 60 grain loads were averaged to come up with a baseline of 2700 fps. According to his records, he at one time had several .244 lead molds, but it is unknown if this is the rifle he was casting for.

Apparently this was a very accurate rifle, as dozens of targets displaying good groups were found with his equipment (though distance to the target was not included). Dale scribbled on one page that he had used this rifle to good effect on deer, turkey, rabbit, squirrel, badger, fox, bobcat, raccoons, prairie dogs, and "many birds" in Kansas.

I shoot the 22K Hornet, and I have to believe that the round in 6 MM would be pretty anemic. There just isn't that much powder space available, even in the improved case.

Ackley list a 25 Hornet in his Handbook For Shooters And Reloaders , but no mention of a 6mm/243. I can find no other referance in my wildcat library.

Could be that the case capacity is too small for any practical gains over the .22 or K version.

I think a 6mm Bee would be a better deal.

More meat around the primer to take higher pressures. There are a lot of nice light 6mm bullets these days to make an updated replacement of the 25-20.

If .218 Bee brass is not good for you try .357 Mag or .357 Maximum.

Thank you all,
Luckyducker, on the finisher that I saw the profile has a shoulder. for this reason I say 6mm-22K-hornet

There are just a lot of wildcatters that have way too much time on their hands, and need to get a job!

A wildcat should have at least some redeeming features other than an just idea!