[CTSixshot]

Need these?
Northeast Target & Shooting Supply has them.

https://nereloading.com/7.62%20x%2039%20.310%20bulk%20bullets%20ak47%20aks%20akm%20for%20reloading%20in%20stock%20free%20shipping.html

These run fine in 7.62x54mmR, .303 British, 7.7x58mm and 7.65 Argentine, too.

BTW, I don't really need these, but I would be willing to go in for 500 of these, if others wanted to do a group order to save a few cents.

[CTSixshot]

Really tough to justify reloading the x39mm, unless you just want to do it. I realize you can beat these prices for components, but just looking at typical retail prices, it would cost about 95¢ per round to roll your own (labor not included):
bullet * 34¢
o-f brass * 37¢
primer 12¢
powder 12¢
* Northeast Target & SS prices

Well, I suppose it's encouraging that the 123gr bullet has only about doubled in price while primers have quadrupled or more.

[CTSixshot]

Duck Creek Sporting Goods (Westminster, CO) also has some mixed boxes and seconds for reasonable...
https://www.duckcreeksportinggoods.com/product-category/bullets/discount-bullets/?swoof=1&pa_bullet-diameters=310&really_curr_tax=293-product_cat