When it comes to surplus 54r ammo you only have two general choices 147 to 149 gr. Light Ball or Heavy Ball which weights generally in the 182 gr. range. LB is the most common and will have a silver tip to designate it as such and in some cases the 440 rd. tin will as well. Later on the silver paint applied to the bullets tip and tin were discontinued.
HB surplus ammo is much less prevalent than it was ten years ago although you see some from time to time,the tip on HB is painted Yellow. Most all your HB ammo or cartridges loaded with 180+ gr. bullets will be commercial made ammo these days. Prvi Partizan or Wolf same ammo different can or S and B or Winchester same ammo different can. Bear and Barnaul still produce 54r steel case ammo using heavier bullets as well.
I have Brass case LB and HB ammo from Bulgaria as well as LB steel case ammo. I also have a stash or NNY Prvi Partizan 182 gr. copper jacket,lead core,non- magnetic surplus ammo that I bought on the cheap years ago and it shot so well in my M44 I put it back fora rainy day. At 100 yds. it only shot about 3" high compared to the LB ammo so I called it good.
Info on the 7.62 x 54r cartridge.
Anything you want to know about the 7.62 x 54r.