ORIGINAL: corey012778
Give me something think about.
I read that other thread. I will think and work it into my budget if I deside to do it.
something I read, there is 2 diff. bore sizes, what is the easy way to find out which one I have. if I got it right.
Actually, it would be nice if there were ONLY TWO BORE SIZES!
The nominal bore size for the Russian rifles, both the 7.62X39mm and the 7.62X54R is bore = .300", and groove diameter = .310". BUT although most of the ones I've seen were pretty close to .300 land (bore) diameter, the crude but simple Russkies gouged out many different depths of grooves in their barrels-I've seen them a true .310", up to the Mosin/Nagant M91-30I currently own, which is a full .314"!!
I have a CZ 527 (not so crude!!) which is .300"/.311". This little rifle shoots .308" bullets very accurately as you probably saw on that other thread!
Ruger made his bores (at least on the Mini-30) to standard US .30-cal. specs, .300/.308". BUT the leade into the rifling was sloped pretty steeply to allow the shooter to use eastern Block ammo which has .310-.312" bullets in it.
If you have a CZ, try it with .308" bullets. My tw Chinese SKS's will also shoot .308" bullets but are more accurate with .311" bullets. My Mosin-Nagant 7.62X54R shoots .311" bullets better than either .308" or .314" bullets. I am going to try some FN .313", 174-grain FMJBT 7.65X53mm Belgian military bullets in it to see if these are better. So far, this particular rifle has not been too outstanding. I just glass-bedded it to see if that helps any.
I have been using Winchester brass, but may switch to Remington, as Rem. cases use Small Rifle primers, just like the PPC rounds do. I think the small primers may be better in this little case.