The only time I tried small charges of BullsEye was in forming .17AH from Hornets. I think it was 1.5gr, not sure, either with a bit of toilet paper or none, and fired upwards. The fellow who mentioned this method on the site, noted to not use any filler or pressures would skyrocket - in that case. Of course much depends on the ctg. case capacity and amount of powder used.

Since forming works so well in normal methods, that's what I use.

When necking up straight, then down in the FL die to postion the shoulder pefectly, there is little case movement in standard chambers and normal loads can be used.

Due to problems at the shoulder of the Hornet brass wanting to split if FForm pressures arne't high enough, I went back to using a normal load in the .17AH and bullets as fireforming for the Pac-Nor bl. were just as accurate as in formed brass. Same loads, too. 34fps slower when forming than in formed brass. I assume that was due to energy used up in bowing the brass out to fit the chamber.