Fire forming is not a standard reloading practice (IMO).
However, in the example above (I'm the OP) I was fire forming 270 Winchester cases into 6.5 '06AI cases.
I used 14.0 grains of 700X (I have since upped it to 15.0 grains) to achieve the result you see above.
The 270 case hold a lot more powder than 15.0 grains, so I needed a way to hold the powder up against the primer and used TP. In any case you have to be gentle with the cases and try not to disrupt the powder primer relationship.
Fire forming is a dangerous thing to do. IF you choose to do it, you should speak with someone you know that has done it before.