That's true, my 42 Savage 2-groove No4 Mk1* was a horror story with BT bullets, but the Faz '55 No4 Mk2 is a shooter with them.
I don't know exactly what's available in Aus, but the bullet #4 in the pictures above was a 174 Gr FMJ-BT for a moisin-nagant. I tried them & they worked well in the '55 Faz, but it had a tight bore. I'm not sure how well the .3105" would do in some other barrels. For some odd reason in the U.S. most of the .311/.312" 150 Gr bullets are FB, but all the heavier 170~180 grainers are BT's! Go figure
Allan Quatermain: “Automatic rifles. Who in God's name has automatic rifles”?
Elderly Hunter: “That's dashed unsporting. Probably Belgium.”