Thread: 6x45 Rem barrel

I might load a few of the 90grs long and single feed them just to get some velocity figures to see if they are worth pursuing in the other rifle.

70gn blitzking or a 80gn soft point were my plans for 6x45 before i sold my donor in a brainfart need $$ haze good luck wingman 😎🤙

you sold a LH zastava.....hang thy head in shame....NO way is my RH one going anywhere anytime soon..absolutely love the wee rifle.the .223 cartridge is a great wee round and limiting myself to 150 yards-200 max and using 50 grn projectiles has never had me feeling undergunned.
the few big reds and the couple of boars that Im come across while carrying rifle sure didnt think it too small to do job.

so if Im reading this right .....cartridge is a .223 necked UP to 6mm?????
isnt that what the myna series were???or was that on .222 case
the .204 case gets used a bit now too.......there are even a few hornary old coots who have .204 necked up to 6.5 and shoot all manner of critters with it.....

Originally Posted by Micky Duck

the .204 case gets used a bit now too.......there are even a few hornary old coots who have .204 necked up to 6.5 and shoot all manner of critters with it.....

Don't let him hear you call him old!

He's 21 plus 40+ years old and has that Kimber and stunning 'Hagn' rifle chambered in that "264 Magic", shot some big critters with those guns!

@Micky Duck
the Myra series were 243-222,257-222 and 308-222 done by Arthur Langsford in oz name after his wife Myra
reasons my LH Zastava was sold was the 223 bit lol
also that evil thing need $$ for bills 🙄

Originally Posted by Micky Duck

so if Im reading this right .....cartridge is a .223 necked UP to 6mm?????

Yes correct.. nothing fancy.. just a .223rem cartridge necked up to 6mm to allow the use of heavier hunting bullets.
Many of the 6mm weights cross over with the .223 weights but where this 6x45 benefits is with the heavier jacketed bullets more suitable for deer sized game and the 6mm bullets actually take up less case room than many of their longer .223 counterparts of similar weights. This meant the little cartridge can really get respectable velocities from 70 to 95gr bullets.

For those not following here is a quick explanation of the more popular related 6mm wildcat cartridges:

6mm/.222 = necked up .222 Rem std .23deg sholder

6x45 AKA 6mm/.223 = necked up .223 Rem std 23deg shoulder

6mm TCU = necked up .223 Rem fire formed straight wall body and 40 deg improved shoulder

6x47 Rem AKA 6x47 Federal = necked up .222 magnum or some now use .204 Rug brass.

There ate variations on all of these with 30deg and 40deg shoulders etc but those are the more common variants.

I had intended on building the 6mm TCU as that what I was told the barrel was pre chambered in. This was not the case.
I dont have the 6mmTCU reamer so I have continued with 6x45Rem.

However I could cut a 6mm TCU (of sorts) with reamers I do have, start with the 6x45 reamer then follow it with a .223 Ackley improved reamer with a 6mm pilot but the body length and body to shoulder junction diameter on the .223 AI chamber will be slightly larger than the 6mm TCU meaning Id also have to make some custom from some .223 Ackley improved dies. While all doable this was just going to be a quick fun project on a cheap and cheerful project .223 rifle I picked up with a rooted barrel.
I intended to move the rifle on once I was done playing but the one off custom chamber would have a limited market.

you forgot the 6mm/08 AKA the EBRG/twoforfree LOL.

Originally Posted by Micky Duck

you forgot the 6mm/08 AKA the EBRG/twoforfree LOL.

Im not sure they are "related".. maybe a creepy second cousin at best

one of the early 6mm widcats.....one of the early speed demons...arguably one of the best that were taken up commercially that have stood test of time.

and no I dont own one,unless a .30/243 counts LMFAO.

Nope never heard if it..

Oh you must mean the 6mm Creedmoor?

splutter splutter...wash thy mouth out you heathen you.....
oh I know...a 6mm remington with a different twist rate barrel so it can handle up to 105grn projectiles......
apparently it kills well if you stick barrel deep enough into ear canal
creedmore........shaking head on that one.......new skid on the jock......

Spent the evening necking up some .223 Lapua match brass to 6mm and have dropped in a full case of H4895
Behind some 70gr Sierra Blitzkings and some 70gr Nosler Varmageddon bullets to test on paper.
Loaded to magazine length both of these bullets compress the 27gr load quite a bit so not ideal but hey ya never know unless you try.





I can already see that my load for this rifle will be very influenced by the mag OAL and having to jump bullets quite a way to the lands as a result.
If these loads dont impress me Ill be trying some 75gr Sierra hollow points which should be able to be seated out a bit further and the more rounded ogive should put me closer to the lands by default.
I will have to run some ladder tests with the BM8208 powder too as I really dont like the compressed loads.

awesome hope this thread dont make go into Debt again in 2020 🙄🤣🤣🤣

Hi Wingman, an option would be to get and re do the project with a 204 CZ , as the magazine is longer I believe and you could seat your projectiles just a bit further.

Originally Posted by Friwi

Hi Wingman, an option would be to get and re do the project with a 204 CZ , as the magazine is longer I believe and you could seat your projectiles just a bit further.

Nah the .204 CZ 527 mag is the same as the .223 mag, the both will hold a max length of 2.350".
Actually both the .223rem and .204 Rug have a Saami std COAL of 2.260". The .204 cartridge was designed that way to be able to run in the current .223 platforms.
The 204 brass is a tad longer than the .223rem but it has a shorter bullet and throat.

If I cant get anything to shoot well with the big jump to lands Ill probably redo the chamber with a .223rem or .223AI reamer (with a 6mm pilot) and then just use a separate 6mm neck reamer followed by a 6mm throater cutting little to no free bore.

It was a mistake on my behalf not to check my reamers free bore against my mag limitation to begin with.. live and learn
The other Zastava mini mauser project I have with the internal mag should lend itself better to the heavier projectiles with the 1-10" twist and std 6x45 reamer.