I have a few wildcat cartridges
many are easy to make
my .30 hart, I can simply fire .300 wby rounds right out of gun and have fire formed brass when I am done, and they will shoot OK accurate as well??

I also have done the corn meal, forget off hand my magic mix,(haven't made any in a few yrs now)but its just a few grains of powder NOT a full charge, a primer some corn meal(have that weight out too, forget amount),and then sticka loose fitting patch in the top to hold mix in
and fire
works great
BUT the bigger issue is, it makes cleaning the gun added pain here
when I shot a LOT of wild cats , I had extra actions and short bbls chambered to JUST be used to fire form brass
could make a LOT of brass sitting on my bench then! and NO need to clean my rifle

wild cat cartridges are NICE and fun way to kill time, but to be honest, I have YET to NOT been able to hold my own at any range with factory chambered calibers and brass
been shooting 1,000+ yrds in matches and for fun for over 30+ yrs
owned a LOT of the latest and greats fad calibers, from small fast to .50 bmg's
in single shots and repeaters for range work.
out FAR weather has the bigger factor IMO than ANY caliber! some days bigger heavier bullets win that game, some lighter faster does!

BACK to the 25-06
nice caliber, BUT tends to be hard on barrels as to OTHER calibers
all the more so if your always loading to the max

a way better deer caliber/sheep, than bigger game IMO too!

OH and forgot to mention
a DRAW back to shooting full charged loads out of a mod chamber, is you also have MUCH higher risks of splitting necks on case, more stress there, and lower life of cases can happen!
plus chamber wear increases as every one splits!
so?