Okay, I made it to the range at the end of the day and here are the results with the three types of ammunition that I have on hand.
I forgot to bore sight the gun at 50m, and I fired one shot with Hornady SST that was 6" low & 3" left, I adjusted the scope & fired another shot dead centre about 1/2" low.
So out too 100m I went... I aimed for the centre target & printed that 3 shot group using the Hornady SST ammo. I switched to ChinaSport (lol) and fired the two bottom left & right groups. And finally broke out the Sellier & Bellot, printing the top left group, adjusting the scope & shot the top right group.
The steel cased Hornady SST feeds & fires fine, I should have shot more groups with it... Next time
The steel cased ChinaSports was another story. Some cartridges chambered fine, others were tight & one would not chamber at all! Never had these troubles with this ammo & my SKS lol... Anyhow, if you needed to, the ammo would do in a pinch and the deer would likely never know the difference?
And finally the brass cased Sellier & Bellot fed & fired beautifully! It printed the two top 3 shot groups on the target, which made me VERY happy!
Cheers
Jay
P.S. ALL the ammo requires the shooter to bring the bolt to the rear with a bit of authority to cleanly eject the casings.