I was getting some stuff together and was looking at the plastic base at the end of my 295s and noticed how flexy they were and got to thinking about the .45 and the skirt issue where the center blows out.
Gander
IMHO you are searching for a solution to a Non-Existant problem
The 45cal PB seals-
Blown out or frayed like a
Hula-Skirt, make no difference what so ever to the accuracy or bullet speed. The higher pressures inherent with the 45cal rifles, upset/obturate the PB
instantly. Even with just 50-60 grains of
ANY powder. That little
"Halo" of yellow seal that just barely circles the bottom
"Post" is of no concern.
Even the newer 45cal 300g Platinums, with the
new flexible seal, almost always has a Halo of seal that stays stuck to the post. 45 cal PowerBelts really just use the Seals to hold the bullet from falling out of the bore. And just for a momentary gas seal prior to obturation. Once that soft lead fills those groves, that's all the gas seal you'll ever need
