changing caliber of sks

gallen270 said:
I emailed pacific and they dont have any models for that caliber reamer, i would have to supply a round for them to copy.
their reply;
I have searched through our print and could not find a print on the caliber but we could build it for you. Allow 3 to 4 weeks for delivery.The cost is $138.00 plus shipping fees.Thank youKathleen

i dont know squat about wildcating, but lee makes custom dies, so id only have to design it on paper. OAL lenght and body would be the same as the x39. would the shoulder angle be the same?

is your SKS-223 project totally scraped or are there some salvagable parts?

im not machinist, so id have to pay someone to do the work.
Click to expand...

Shoulder angle would be more extreme than the stock round. Would look like the Winchester Short Magnum rounds. You could keep the same angle except the case length would be longer, 5.56x40ish. I would increase the angle and keep case length at 39mm.

My SKS223 project is totally scrapped. It is slowly being converted to a 7.62x39mm SKS-D due to the heavy bolt modifications and cutting of the receiver to accept the AR15 mag well. The .223 barrel was cut off the receiver and the stub pressed out.

You will want to use a Norinco SKS with a threaded receiver. My buddy DaveGP bent a couple of rams on his press trying to get the stock barrel out. It will be easier to thread the barrel than try and get 30 tons out of a 20 ton press! :)

Any thoughts on how you will form the brass? I am thinking it will be two steps, first one to get it down to ~6.5mm and then one more to get it to 5.56mm. Lapua brass is decently priced (53 bucks per 100 cases) and very nicely made. Unfortunately forming brass is outside my realm of knowledge...
 
tonight im gonna look into the shoulder angle a bit closer, and try to get an email off to lee about dies.

case capacity would be increased slightly more than a standard .223 so it could make a good varmit round, .223 is 1.87cc, 7.62x39 is 2.03cc.
 
Last edited:
theoneofthechuck said:
Somewhat off topic here, but would the standard 7.62x39 fire safely out of a .308 barrel?
Click to expand...

im not sure if im reading this right. im assumeing you know its a shorter round and wont chamber and fire in a 308. its the bolt face does grab it, its going to make a mess of the brass and the bullet will.....

the bullet in .303, 7.62x54 and 7.62x39 are .311'', whereas 30.06, .308 ect all use .308'' bullets. three thousanth's doesnt seem like alot, and it MIGHT make it through, but the pressures will be dangerous and excessive.
 
what about opening up the neck on 5.45x39, rather than sizing down the 7.62x39? the differnce isnt alot, and it shouldnt be hard to run a .223 expander through the neck.

couple of questions...

are they based on the same parent case?

i know the rounds are not availible for civilian sale, as they arnt approved, but would some boxer primed brass avaible?

angles, and case dimensions in mm's for 5.45mm cartridge;
545x39mm.jpg
 
PerversPépère said:
6,5x39... hey, that could be nifty!
PP. :)
Click to expand...

in new brunswick, from the end of deer season (late novemeber) until the follwoing moose season (exception of spring bear) we can only use rifles less than .23 caliber for small game and varmits. no bush shooting with 6.5's, .30 cal's ect. it sucks, but thats the law and the wardens are bored and heavy handed. so if it came to a build, id have to go with .223.
 
gallen270 said:
in new brunswick, from the end of deer season (late novemeber) until the follwoing moose season (exception of spring bear) we can only use rifles less than .23 caliber for small game and varmits. no bush shooting with 6.5's, .30 cal's ect. it sucks, but thats the law and the wardens are bored and heavy handed. so if it came to a build, id have to go with .223.
Click to expand...

Remind me to never move to New Brunswick :eek: Beautiful province most like, but, yeah, I love shooting my non-restrict's out in the bush or down at the quarry
 
400px-7.62x39mm_round.svg.png


5.45 has a 1.35mm smaller case head. This means you will have to silver solder a reducer ring into the bolt face and the modify the extractor slightly to grab the smaller case. Also, the shoulder angle is 8 degrees steeper on the 5.45. This is all academic though as, according to my Google search, there is no brass cased boxer primed 545 brass on the planet. Even Hornady's new loads will be steel cased.
 
gallen270 said:
in new brunswick, from the end of deer season (late novemeber) until the follwoing moose season (exception of spring bear) we can only use rifles less than .23 caliber for small game and varmits. no bush shooting with 6.5's, .30 cal's ect. it sucks, but thats the law and the wardens are bored and heavy handed. so if it came to a build, id have to go with .223.
Click to expand...




I'd be willing to challenge an arrogant C.O. in court over this (shooting my non-restricted gun of choice, regardless of caliber). Particularly since I like plinking in the bush/gravel pit.

On a weekend to ruin his boating plans, no less. :D
 
I'd be willing to challenge an arrogant C.O. in court over this (shooting my non-restricted gun of choice, regardless of caliber). Particularly since I like plinking in the bush/gravel pit.
Click to expand...

Good luck. What would you put forth as a challange? Considering the approved NB rifle ranges are generally in the bush/old pits why not just get a membership and shoot your .470 nitro there?
 
as far as the NB wildlife thing, i agree, but the only way to challange it would be to get arrested, ive written several letters to the minister of natural resources, but he doesnt seem to interested.

ok, scrap the 5.45x39, back to necking down the 762x39 to 5.56. the point is not to modify the action or mag.
 
6.5 Grendel?
6 PPC?
22 PPC?

I thought these cartridges where based off of the 7.62x39 case.
From: http://reloadbench.com/cartridges/22ppc.html
Historical Notes:

The 22 PPC was developed in 1974 by Dr. Louis Palmisano and Ferris Pindell, primarily as a benchrest cartridge. Although originally a wildcat, Sako of Finland introduced commercial rifles and ammunition late in 1987. Norma followed suit on 1993 with loaded ammunition. The cartridge is based on the 220 Russian case which is a necked down version of the 7.62x39mm Soviet military cartridge. The Wichita Engineering and Supply Co. made the first rifles for both the 22 PPC and 6mm PPC cartridges. Many custom rifles have been turned out in this caliber. In 1993 Ruger announced their No. 1V and M77 varmint rifles in this caliber.

General Comments:

The originators altered the 220 Russian case by giving it a 10% body taper and a 30% shoulder angle, as well as expanding the the neck to accept the standard .224" diameter bullet used in the U.S. The cartridge cases are made in Finland by Sako and in Sweden by Norma and use Small Rifle primers. Although the 22 PPC is a short rather stubby case only 1.51" long, it nevertheless develops ballistics superior to some larger, longer cartridges such as the 222 and the 223 Remington. The 52 grain bullet can be pushed out of the muzzle at over 3500 fps, and this definitely places the 22 PPC in the varmint and small game class. A 1 in 14 inch twist has become pretty much standard for these rifles although 1 in 12 inch twist sometimes be found.
Click to expand...
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom