[rurallife]

So I scored the beauty 28/30. Apparently it’s safe to use modern Russian commercial Ammo. My Barnaul 148 boxes say it’s safe in 7.62x53r rifles.

But how about Prvi? I’d like to get some 174 up to 208 grain Ammo, to see what the M39 and 28/30 can do, what they like best.

There’s this stuff from a trusted seller,
7.62X54R FMJ 182 Grain Ball Prvi - PP76254B. Military overrun with sealed primers. Any opinions? Thanks.

I’m not slugging the barrel and all that, I’m not gonna use surplus. Ever.

 

[Leon]

Prvi 7.62x54R has lead cores, so the bullet will compress inside the .3085" bore of the M28/30. The same applies to Serbian M30, which is corrosive Berdan primed. Just avoid any Combloc milsurp ammo with steel cores.

 

[jp]

As Leon states, a .310 lead core bullet will compress going thru a .3085 groove diameter rifle. 148 grain bullets are fine.
However, is your rifle "D" throated, which reams the throat for longer bullets such as 182 grains and up? If the longer and heavier bullet is jammed into the rifling upon loading in a non-D throat dangerous pressures may result.
Been there, done that, with an M28 that had the original short throat; it blew out the primers.... messy clean up with soot all thru the action. This was with Yugo surplus 182 grain...

 

[Mangrove]

Prvi 7.62x54R has lead cores, so the bullet will compress inside the .3085" bore of the M28/30.

As Leon states, a .310 lead core bullet will compress going thru a .3085 groove diameter rifle.

I keep writing this, but according to 1931 Civil Guard and 1965 Finnish Defence Forces blueprints, the groove diameter of unmodified m/28-30 barrel is 7.83mm + 0.04mm (anything between .308 and .310 in). The bore diameter is 7.59 mm + 0.04 mm (anything between .299 and .300 in).

 

[rurallife]

Thank you Mangrove.

I’ve read many conflicting pronouncements on this. The only real problem I can ascertain is the length of the chamber.

Concerning the bore, how many reports have been made documenting catastrophic barrel failures with .308 diameter bores with so-called “.311 bullets blowing up the barrel”. I can’t find any.