sh3rm4nt4nk
Member
- Joined
- Dec 10, 2006
- Messages
- 21
".25-06 runs quite a bit faster with 90-100gr bullets than 2800fps. A .25-06 will throw a 117gr at around 3200fps, so with a 90-100gr bullet I am guessing 3300-3400 is quite possible. While it would shoot nice and flat, and have good on target performance the weapon would be really large for a magazine fed rifle, and with a round that far overbore barrel life would be unacceptably short."
What is the expected life of a M16 barrel?
Looking up overbore I found definitions like "the case capacity in grains of water divided by the area (in square inches) of the bore cross-section".
I think friction and heat have the greatest effect on barrel life. Increasing the velocity and surface area of the bullet in contact with the barrel will increase heat/friction. This will be mutiplied by the length or the bullet as the longer any section of barrel is in contact with the bullet the hotter it will get. So any increase in bullet weight needs a porportional increase in bullet diameter to maintain the same heat and barrel wear at a given velocity.
I think if I were looking for something between .223 and .308 that's not very overbore .260 remington or something like it would work.
http://www.remington.com/products/a...istics_results.aspx?data=R260R1*R223R1*R308W2
What is the expected life of a M16 barrel?
Looking up overbore I found definitions like "the case capacity in grains of water divided by the area (in square inches) of the bore cross-section".
I think friction and heat have the greatest effect on barrel life. Increasing the velocity and surface area of the bullet in contact with the barrel will increase heat/friction. This will be mutiplied by the length or the bullet as the longer any section of barrel is in contact with the bullet the hotter it will get. So any increase in bullet weight needs a porportional increase in bullet diameter to maintain the same heat and barrel wear at a given velocity.
I think if I were looking for something between .223 and .308 that's not very overbore .260 remington or something like it would work.
http://www.remington.com/products/a...istics_results.aspx?data=R260R1*R223R1*R308W2