No STG they are still in business and it is booming, as you would be aware 303 Britishreloading gear is getting harder to source nowadays. The man who is no longer in business is Mr Bone of the Taipan projectile fame, I still have 500 odd left and am going to slash my wrists the day the last of those goes down the barrel.
The PP protected point is a good idea if you look at them the outer jacket comes to a hollow point, the lead core comes up flush to the rim of the jacket which saves the soft core from damage as it's fed into the breech.
I get them for $33 (aus) a box of 50, not sure what the law is your end but if you need any and they are expensive over there can post some over for you.