I favor the Mini-30's, but have had several Mini-14's as well.
I really liked PMC's version of the M855 "green tip" penetrator.
The M855 is not known for accuracy due to the steel core making the bullet a bit "wobbly", but the PMC version ( they call it the X-Tac L.A.P., light armor piercing) was more accurate than the Lake City version.
Cases are annealed and primers sealed, just like the real deal, but the PMC L.A.P. runs a bit lower in velocity than the NATO stuff.
About 2 MOA and 3050 fps for M855 out of a 16 inch barrel, and I was getting 1 1/2 MOA and 2925 for the PMC.
For an expanding bullet I reloaded 60 grain Hornady V-Max, there are factory loads for the same bullet, although 55 grain will be easier to find.
I liked the rounds in the 60 grain range so as to have a similar POI as the 62 grain FMJ/green tip.
Optimum bullet weight will also depend on what series Mini you have. Older ones had a 1-10" twist, then changed to 1-7", now 1-9".
Sunflower Ammo.com: Ruger Mini-14/30 Barrel Twist Rates
You can tell the series you have by the first three numbers of the serial #
Some other excellent ammo for a very reasonable price is from PPU. Great brass to save for reloading as well.
