I have seen several threads in reference to breech seating. Here are some photos of different types of breech seaters.
top is plugged case, then a push seater, toggle seater for CPA 32.40, toggle seater for Ruger #1 375 H&H.
This shows breech seater before the bullet is seated
Can't get this pics turned for some reason. This is the breech seater with the lever pushed forward to seat the bullet.
bob