I prefer to fire form my own brass to the chamber of my own gun. Not even sure how you could fire form without the projectile since there would be no back pressure to form the brass, but Jerry knows what he doing.
Forming a case without a bullet is easy and cheap. "COW" or cream of wheat fireforming (I prefer cornmeal). Light pistol powder charge, cornmeal to base of neck, piece of paper towel stuffed into neck to hold all in place. Fire it at the range. I did over 100cases in 1 hour session over the winter... some snow, and cold temps, barrel was never really hot. Clean chamber and bore once in a while or when you see dings in cases.
I got a Ruger Predator to be my slave/FF rifle. I easily paid for the rifle for the difference in price vs premium brass and I will be able to use this rifle for 10's of thousands of cases. The chamber IS much larger then my McGowen prefit which let's me size to a precise fit.... I don't need to fireform with a bullet. I can just load a bullet and head out to a match.
For the first time, all these oversized factory chambers ARE a good thing. COW form to a bit oversized, size to precisely fit your rifle, load a bullet and go play. If building a custom rifle, set up the reamer to fit your die... voila, easy ....
If you have cases that are much shorter then the chamber, a secondary shoulder can be formed to ensure a tight headspace in the rifle.
Except for a couple of chamberings, there is no real reason to use expensive match brass. If F class accuracy is not needed, why use F class suitable brass? More and more US manfs are offering bulk brass with far less costs (boxes cost a ton of money). The option to fireform inexpensive brass can drop the per unit price tremendously.
My 6.5 CM uses PRVI 22-250 brass. With all these mid sized cartridges, 22-250 is your friend. Less costs, plenty durable and once prepped, equally accurate. Over the winter, doing some brass work is not a chore.
Don't want to do much fireforming, Hrn, Nosler and others will be offering non box brass for popular chamberings like the 6.5 CM. The hrn I have been offering is around 1/3 less then in a fancy Hrn box. Same brass. Will likely be 1/2 the price of Lapua.
My formed PRVI is around 1/3 the price of Lapua... don't care if I loose this stuff. Find some old Win or Rem 22-250 at gunshows and you might drop costs even more.
So there are plenty of ways to keep cost and stress about your brass to a min....
Jerry