Ducksoup, the fed 205 does not have a thick primer cup. The 7 1/2, CCI-BR-4, and the CCI 450 do have the thick cups.
I only made mention of this so you may not get yourself in trouble.
In these hard times primers around my house are difficult to come by. I see mainly see Win and CCI at the gun shows. Rem and Fed primers are unheard of.
If I had to choose one primer over the others, I would choose the CCI 450 due to the thick primer cup, cost, and availability. Like I said, the Rem 7 1/2's have not been seen around here for quite some time.
The reason that guys want a thicker cup primer is so that if their load is near the top of the pressure curve, if/when they go out on a really hot day and let their ammo sit out in the sun in a case guard 50 with the top open, they will hopefully not blow a primer. The powder usually ends up getting blamed for being temp sensitive, but you let the sun heat up your ammo, and pressures will go much higher and your accuracy is blown.