The title says it all. Looking to possibly build one of these for fur hunting and as a general purpose winter truck rifle. ..I like the 223 case because Ruger magazine s holds 5 down. Am hoping for up to 90 grain bullets up to 2850 fps. Thanks.

here's data for 6/45 - quite a popular round, not to sure about 2850 from a 223 case, might consider 6x47 which is the 222 mag case
http://www.predatormastersforu...=1455558#Post1455558

Thanks butchlok ; I have been on PM quite a bit lately. I'm hunting for my perfect winter up here winter rifle. It's a toughy. I want to be able to poke a hole thru a fox or lynx and not blow a huge hole out the back side. And with the same rifle shoot a caribou at a less than perfect angle at 300 yards and make a clean humane kill.... Will prolly need 2 different loads. The 6mm may be a little light for the caribou. Am probably going to end up with a 6.5 Creedmoor as Ruger stopped making the 260 Rem.. 110 gr Barnes Banded solids @2800 fps for fur and 120 gr GMX SuperPreformance factory loads for bou..

I downloaded the 6/223 load data.It is about ideal for a fur rifle.especially coyote+ wolves. 75 gr Speer @2900 fps. And fox w 75 gr Barnes or 80 gr Hornady fmj @2800..

I have 2 6X47 (6mmX 222 Rem Mag.)
This is an excellent round.
Depending on what your twist is you can use 55 grn to 100 grn bullets in a small compact rifle.

The 25 Kimber might also be one to look at.

I have two. One started as a 6x47, but I set it back and rechambered. Great round. One is a mini-Mk X, one is an L-461. Neither action is long enough to function a 6x47 through the magazine.

What is a 25 Kimber? ??

17, 20, 22, 6MM, 25, 6.5mm, .270, 7MM and 30 "TCU's"... all have been done on the 223 case...TONS of data scattered all over the web and reloading books for all of them...some of them even are "factory" rounds now. ANY of the larger cals would make excellent Caribou/fur shooters.

I'm an old wildcatter from the way back "dreamland", but in todays world, unless you just want to mess around with something you have to constantaly work at to have ammo for, I don't think a wildcat is all that neat...way too many factory rifles, ammo and useful cartridges available with ammo at just about ANY -Mart...to go mucking about futzing with wildcats.

Of course, that doesn't apply to me.... ...I have this addiction/affliction to wildcatting, no vaccine available OR cure and can't stop making them...

Luck

Kimber of Oregon made a handfull of them, I saw one back then and did not know that 30 years later I would want one.

Mark

I had no idea the TCU line was based on the 223 case. .. All these little rounds are pretty new to me.where I lived mostly in Southeast. There were.no fur bearers to be hunted by a non native Alaskan. Seals are the domain of the 220 Swift or 22-250 . 17 Rem worked good also if the wind wasn't blowing too much .. The goal with a seal is to be all lined up and ready to shoot. Watch it exhale then inhale. Then pop the top of its head off.. If you suck their brains out instantaneously they won't.exhale and sink. Then you zoom over and gaff them and pull them into the boat.

I have two 6x45 one is a remington 700 the other is a mini mauser. They have a 1/10 twist. I shoot 85 and 80gr.bullets it kills whitetail very good. I have tryed the 6x47 & 6tcu I like the 6x45 the best.
I reload 27gr. H4895

The 222 Rem Mag case was also done TCU style for a bit more pizzazz...basically the 204 Ruger is a necked down and TCU'ed(Ackleyized)222 RM.

You could say the 257 Kimber is a 25 cal - 222 RM TCU...or a 25/222 RM AI - Ackley Improved.

Luck

I did 3 6x45 on AR 15's. Two with a 9 twist and one with an 8 twist. All three shoot all weight bullets great even the 100's. Very very accurate rifles.

The 25 on the 223 are interesting, but if chambered in an AR they are a little too much bullet for it because of the bullet being loaded down into the powder capacity. The 6mm kind of has that, but not as bad, with the 100 grain bullets. All this because of the requirement to fit the AR magazine. Whole different ball game in a bolt rifle or single shot.

quote:

Originally posted by gumboot458:
The title says it all. Looking to possibly build one of these for fur hunting and as a general purpose winter truck rifle. ..I like the 223 case because Ruger magazine s holds 5 down. Am hoping for up to 90 grain bullets up to 2850 fps. Thanks.

I have a Savage 24V, rebored to make a 6x45mm. Twist is 1:9.5, thinking I'd use heavier bullets but I never did. I use 85 grain Noslers for the most part, only shot one antelope with the rifle barrel so far (and a few birds with the 20 gauge lower barrel).

When it was a 223/20 gauge it didn't reliably fire military surplus ammunition, something to do with the shoulder angle maybe.

Thanks for the replies everyone. I'm ruminating all the info .. Lots to consider. ...

I have had 6x45 (6mm/223) for about 30 years now. I shoot the 75 gr. Barnes X and the 75 gr. GS Customs monolithic hollow points at an easy 3000 FPS in my sako L-461 custom that I built. My most accurate load is the 60 gr. Sierra HP with 25 grs. of H-322. This is my rock chuck load and its good on Coyotes also..

I have shot Whitetail, Mule Deer, Hogs, Javalina, African plainsgame on cull including Kudu and it has always worked 110%...If it has a flaw its that the caliber does not normally leave a good blood trail so I only use it in open country on big game.

I am looking at a 25/222 Rem Magnum..Has anyone got some ball park figures on its velocity with 60, 87 and 100 gr. bullets..It also is a L-461 Sako, but I'm also concerned how many round it will hold in the magazine, I'm betting only two and a 3rd one willl jam things up..

Ive built and am now in the process of load development for my 25-223 AR.
I am using H335 and started with Nosler 85gr BT
they fit and feed from a standard AR magazine, so far during the breakin and function phase they have done very nicely. 75yds are making a 3" group because the rifle would need to be manually cycled due to being very tight.

As of now i have 50rnds through it and 50 more made for further breakin and testing. Some of the guys i know on another forum are getting fantastic results for deer and hogs. Mine will mostly be for this coming groundhog season.
Dies are from CH4D, my load right now is 25gr of H355 under 85 gr, cci 41 primer, and COAL of 2.258".

Here is the last target i shot from the initial 50rds @ 75yds


Here is the rifle with donor scope, it will wear a Vortex 4-16x50LR on a Larue mount

Ray;

~3-4gr difference depending on case brand, ~10-15% case volume increase and 0.060" difference in shoulder position/case length. Maybe .5-1.5 gr more powder increase for ~100-150fs, maybe a bit more...all depends on all the factors.

31-3200 with RL10x/75gr Vmax, 28-2900 with RL10x/87 Horn, 25-2600 with RL10x/100gr Horn...more/less at 50-52KCUP...round numbers...a bit more with the AI case and 25-30 gr powder...CHEAP SHOTS.

For my taste I wouldn't rechamber a nice shooter unless I found a free reamer and didn't have any other pressing things to do, but I might start out a new barrel/rifle with the longer case in the AI version which nets you an additional ~1gr. Should end up ~35-37 gr H2O...

The velocity increase is interesting enough to look at. I've always had it in the back of my mind to do a 6mm TCU barrel for one of my XP actions...I have a picture of Bob Milek firmly stuck in my mind of him, and XP and an antelope

Whether it feeds or hangs up is always the unknown question which usually have solutions and it would make a very nice single shot in any case.

Luck

To be more specific..my 6x45, L-461 custom rifle,19" Douglas barrel, 0 tolerance chamber, IMI brass, outside neck turned,CCI 200 or fed.205,
1. 60 gr. sierra, 25 grs. of H322, 3122 FPS (10)

2. 75 gr. Barnes X or GS Custom, 26 grs H322m 2944 FPS

3, 75 gr. Nosler solid bse. 28 grs. IMR-4895, 3087 FPS and 30 grs of H335 gave me 3235 FPS and .002 head expansion!

I have hundreds of loads for this caliber but the first two are my go to loads along with 27.5 grs of H 335 for my max at 3112 FPS,

This rifle has never shot OVER an inch, it weighs 5.5 lbs scoped..Stock is an English style stock with pancake cheek piece styled after my Afrian custom rifles and with an full fiddleback piece of very dark blood Red exceptionally hard claro that checkered at 26 LPI..

One of the few rifles that has never been for sale and never will be..That is a 7th wonder around my house.

I love the 6x45,,,

4.

Sounds like an excellent rifle...going to a RemMag AI version might just give you a nice kick in velo or might just mess up a very good thing...you know all about what can happen.

I wouldn't even THINK about mucking about with a rechamber or new barrel with that one, but a new rifle is ALWAYS a nice thing.

Luck

I like the idea of using the necked up 222 case and trimming the neck back a bit to mag feed in 2.25" magazines.

That would be the 6mm-222...been around a long time...excellent cartridge...the 223 just blew the 222 and all it's iterations oudadawada when it arrived on the scene, but I'll wager there are lots of rifles chambered for it still shooting up a storm.

Luck

Foobear,
The longest case that the L-461 will take without problems, and give you room for all bullets and take 4 down is the .223 case..Its a cute little action, but limited my length and width....

I once built a shortened 30 Rem necked up to a 30 caliber bullet for a L-461, but it would only take 2 down an one in the barrel, which is Ok I suppose but I was never satisfied with it.

That said I really have been satisfied with it and have had it since 1982, and thats a long time for this old gun pimp..