View Single Post
Old March 14, 2000, 08:12 PM   #2
Art Eatman
Staff Lead
 
Join Date: November 13, 1998
Location: Terlingua, TX, USA
Posts: 22,576
If the bullet diameter is the same size as the bore diameter--and it should be--there can be no expansion within the bore.

If the bullet is a slight bit smaller than the bore, it will be upset slightly by the initial heat and pressure when the powder ignites. In this case, a flat-based bullet will be more likely to expand to bore diameter than any boat-tailed bullet.

One of the bad things in rifles--or pistols--would be for the flame front to be able to get past the bullet. It would erode the bullet in a non-uniform manner somewhere along the jacket as it did this, and thus ruin any hope of accuracy. It would be even worse for lead bullets--which is why lead bullets are commonly one or two thousandths of an inch larger than the bore diameter.

FWIW, Art
Art Eatman is offline  
 
Page generated in 0.13872 seconds with 7 queries