Hollow Back Bullets
Quote from Reloader on March 20, 2012, 8:17 pmIs there a pressure difference that should be accounted for when utilizing hollow back bullets. It would make sense, as there is now a hole in the back of the bullet creating a larger combustion chamber.
Also, are there any significant benefits to a hollow back v. a traditional bullet. The only thing that I can think of is that a hollow back would work more like the old minie ball expanding quickly into the rifling of the barrel.
Is there a pressure difference that should be accounted for when utilizing hollow back bullets. It would make sense, as there is now a hole in the back of the bullet creating a larger combustion chamber.
Also, are there any significant benefits to a hollow back v. a traditional bullet. The only thing that I can think of is that a hollow back would work more like the old minie ball expanding quickly into the rifling of the barrel.
Quote from Reloader on March 22, 2012, 3:05 pmThe hollow space, all else remaining equal, will very slightly reduce operating pressure. The advantage is not in pressure reduction as much as in obturation, as you referred to in the Minie ball. The bullet can more readily seal to the bore. Most often nowadays it is done to allow seating a lighter bullet at an already establish overall length for reliable feeding in a pistol.
The hollow space, all else remaining equal, will very slightly reduce operating pressure. The advantage is not in pressure reduction as much as in obturation, as you referred to in the Minie ball. The bullet can more readily seal to the bore. Most often nowadays it is done to allow seating a lighter bullet at an already establish overall length for reliable feeding in a pistol.