Hollow Base VS Flat Base bullets?......

[Mikej]

I am surprised this has not been further mentioned or discussed. My experience with hollow based bullets are purely with .38 hollow based wadcutters.
And my old-school understanding, is the hollow base is for aiding accuracy. Not unlike an airgun pellet or rifled slug, the hollow base causes the bullet to remain stable in spite of a lack of rotation due to lower velocities. Not any different than a badminton shuttlecock.

But...but....




I can't say that's wrong, but a shuttlecock (BIRD the way I learned it when we used to play in the backyard ) would be a different thing being flared out at the rear. And floating through the air.

 

[WAYNO]

Flared skirt for velocity control. Weight forward for stability.

 

[osprey]

I do not have much experience with hollow based pistol projectiles but I have a bunch of experience with airgun pellets and muzzleloading bullets that need to obturate to accelerate down bore properly.
Most of the hb pistol bullets I have seen have pretty thick walls and would not tend to flare out much if any during firing. However a hidden benefit may be that they have to be longer for their weight to account for the weight loss in the back cavity. This would tend to increase bearing surface and possibly help stability by engraving on rifling better?