There are actually a large range of bullets for 9.3mm.
They range through 232gr, 250gr, 270gr, 286gr and 320gr.
From memory that's almost bigger than 358 cal.
I realise there are ton of FPs made in 35 cal but they're for 35 Rem and 356 Win.
They just tend to be expensive as they're made by premium companies.
I agree there are some .366 caliber bullets, but nowhere near the larger selection available for .338 or .358 bullets other than 10 to 20 grain more in the 300 grain bullets, not a measureable factor. Hornady makes a lot of inexpensive, but high quality bullets for all calibers below. Not all are expensive premium bullets. Just do your own search on midwayusa.com. or other sites. I buy most my bullets from gunbroker.com and save every time.
.338 bullets range from 160, 180, 185, 200, 210, 215, 225, 230, 245, 250, 265, 275, 285 to 300 grains all from various manufactures, Barnes, Berger, Bore Tech, Combined (Nosler/Winchester) Technology, Hornady, Lapua, Lazzeroni, Norma, Nosler, Remington, Sierra, Speer, Swift, and Woodleigh. Lots of bullets are being made for the 338 Federal and any bullet is perfect for the 338-06 A-Square that are made for the 338 Winchester Magnum, 340 Weatherby Magnum, or 338 Remington Ultra Magnum.
.358 bullets range from 180, 200, 220, 225, 245, 250, 275, 280 to 310 grains all from various manufactures, A-Square, Barnes, Hornady, Hunters Supply, Nosler, Remington, Sierra, Speer, Swift, and Woodleigh. Not all are for 35 Remington or 356 Winchester, but spire points for 358 Winchester and 35 Whelen or 350 Remington Magnum.
.366 bullets range from 232, 250, 270, 285, 286, to 320 grains all from various manufactures, A-Square, Barnes, Hornady, Lapua, Norma, Nosler, Speer, Swift, and Woodleigh.
yooper77