Post by Bullshop on May 7, 2019 19:41:21 GMT -7
#1
Q- How fast can I shoot these before leading occurs.
A- As is often the case the answer to this question is ""IT DEPENDS "
What it depends on mostly is chamber pressure. Bullet hardness and bore condition are also factors but chamber pressure is the main component to be dealt with.
A few very basic rules to guide you are,
#1 At velocities not exceeding 1300 fps alloy hardness is not critical
#2 At velocities from 1300 to 1500 fps gas checks are not needed but alloy hardness becomes an issue
#3 At velocities over 1500 fps alloy hardness must be compatible with chamber pressure and gas checks are needed.
PLEASE NOTE -- These velocities are not boundaries that will cause leading if exceeded but may result in unacceptable accuracy. Assuming proper bullet fit, alloy hardness for chamber pressure, and bullet lube accuracy will be lost long before leading will occur.
Rules of thumb
A rule of thumb to determine approximately what alloy hardness is appropriate for what chamber pressure is, Bullet alloy hardness in BHN x 1750 = chamber pressure.
A rule of thumb to determine what alloy hardness will yield some bullet expansion on game is, Bullet alloy hardness in BHN x 100 = impact velocity
#2 Q - How do I know if I need gas checks?
A - As a general rule assuming proper alloy hardness for chamber pressure for velocities less than 1500 fps in most cases gas checks are not needed. For velocities in excess of 1500 fps I always recommend the use of gas checks.
PLEASE NOTE - Gas check type bullets can be used without gas checks at appropriate pressures/velocities compatible with plain base bullets. In some cases using a gas check type bullet without the gas check can enhance accuracy at pressure/velocities compatible with plain based bullets. Please refer to the thread on this forum about shooting gas check type bullets without gas checks. We gained some interesting insight on this subject in the thread.
Q- How fast can I shoot these before leading occurs.
A- As is often the case the answer to this question is ""IT DEPENDS "
What it depends on mostly is chamber pressure. Bullet hardness and bore condition are also factors but chamber pressure is the main component to be dealt with.
A few very basic rules to guide you are,
#1 At velocities not exceeding 1300 fps alloy hardness is not critical
#2 At velocities from 1300 to 1500 fps gas checks are not needed but alloy hardness becomes an issue
#3 At velocities over 1500 fps alloy hardness must be compatible with chamber pressure and gas checks are needed.
PLEASE NOTE -- These velocities are not boundaries that will cause leading if exceeded but may result in unacceptable accuracy. Assuming proper bullet fit, alloy hardness for chamber pressure, and bullet lube accuracy will be lost long before leading will occur.
Rules of thumb
A rule of thumb to determine approximately what alloy hardness is appropriate for what chamber pressure is, Bullet alloy hardness in BHN x 1750 = chamber pressure.
A rule of thumb to determine what alloy hardness will yield some bullet expansion on game is, Bullet alloy hardness in BHN x 100 = impact velocity
#2 Q - How do I know if I need gas checks?
A - As a general rule assuming proper alloy hardness for chamber pressure for velocities less than 1500 fps in most cases gas checks are not needed. For velocities in excess of 1500 fps I always recommend the use of gas checks.
PLEASE NOTE - Gas check type bullets can be used without gas checks at appropriate pressures/velocities compatible with plain base bullets. In some cases using a gas check type bullet without the gas check can enhance accuracy at pressure/velocities compatible with plain based bullets. Please refer to the thread on this forum about shooting gas check type bullets without gas checks. We gained some interesting insight on this subject in the thread.