As always start and the recommended starting load and work your way up slowly watching for signs of pressure.I spent about a day working on loads for my YUGO & Chinese SKS. Using Winchester cases,trimmed to length with the Lee case length gauge & cutter, CCI #34 Mil-Spec primers, AA1680 powder and the Hornady 123Gr. SP seated & crimped right on the cannalure. There is nothing special about this load,It just simply shoots. I think most SKS's in good working order and a good bore would do this with the correct load work up. The Mil-Surplus ammo just doesn't bring out the best in these rifles.
Test Targets
Dies: Lee Pacesetter 3 die set w/factory crimp die.
Brass: Winchester
Primers: CCI #34 Mil Spec 7.62 mm Large Rifle Primer bought in 1K lots use with Winchester Brass
Powder: Accurate 1680 / Reloader#7 / IMR 4198 all excellent powder for the 7.62 x 39 mm
Bullet: Hornady .310 123 Gr. SP/ FMJ / V-MAX
Bullet: Speer Hot Core & Prvi Partizan 150 Gr. .311 dia. shoot really nice in both my SKS Rifles
Ok got out this morning and did a little testing with my 150 Gr. SP loads. I feel like this load will shoot allot better I'm using iron sights and my eye sight of late isn't what it used to be definitely need a new pair of glasses for my shooting to improve. My sights are set 1" high at 50 Yds. The load functioned perfectly ejecting the spend brass about 15 ft. from my table. I had one slight flyer on each group or they would have been a bit tighter,but I'm happy with the results for a short range heavy bullet load. Max load in the LEE manual is 24.8 Gr. of Reloader #7 My load was 24.0 Grs. even. I saw no pressure signs on the primer with this load,according to the load data the MV is a little over 2100 fps. I used the load data from the newest LEE reloading manual. The rounds seem to equal the feel of Golden Tiger Russian ammo they definitely have a little punch to them.
Speer 150 Gr. .311 FB SP The black squares are 1/2"
Prvi Partizan 150 gr. .311 BTSP
I use the TechSight front post on my YUGO only. The rear sight on my YUGO works just fine with the smaller dia. pin its about 1/2 the size of the original factory pin. You will need to spread the bottom of the new pin slightly so you get a good tight fit I also put a drop of blue thread locker on mine once I got it set.
Small diameter front sight post click on the accessories tab on the left side of web page.
http://www.tech-sights.com/The rounds are crimped using the LEE factory crimp die that came with my die set. The .310 dia 123 gr.bullet crimp shows up more because of the cannelure, however the .311 dia 150 Gr. Speer bullet does not have a cannelure and is crimped on a slightly less heavier setting becauseof the extra 0.001 that helps hold it in place. The LEE factory crimp die will not crush the case like the regular roll crimp will if you apply to much crimp, it just compresses the neck at the point of contact and makes a nice round neck crimp.
I have seen no ill affects on accuracy using the Lee FCD on bullets with no cannelure.