Added to my Rugers, a new "all weather" Mini 30. Has anyone here had any experience shooting the Russian ammunition with berdan primers with a newer model M30 with the tapered barrels? Has been cold enough here have not gone out to the range to try the rifle out yet myself. I know there are springs out there to help the firing pins strike with more force, hoping maybe the newer models do not need modifications. Reading the owners manual Ruger is still calling for 7.62X39 USA spec ammo. Thank you in advance for your info!