I think I've got the 5.7 casing .308 round nose pills system down, however the best I can get is 180 gr. with out exposing the tip to get the last 10 gr. for 190 sub Sonics. Has any one used exposed tips in a 300 blackout? I know there are shooters who are using cast Boolits, but they are harder lead which takes a little more abuse in semi autos.
Thanks,
Bill