Disclaimer: I am a student, not an expert, and these are my
notes. If you need an expert, consult any gun forum, they all
claim to be rifle experts.
These are parts of our class notes for conventional
powered rifle competition training.
All brand new
conventional competition high powered rifles should be fire-lapped to
ensure that the barrel is super smooth and clear. A failure to
fire lap does not always mean a barrel with flaws, but 25 shots with
fire lapping ensures that the barrel is properly broken-in.
describes fire-lapping of a 308 Remington 600 rifle used in 1,000 yard
ALWAYS use a “shot log” to record each and every
shot that is fired. A 308 will have a 1,100 round lifetime for the
barrel. A .223 will have a much longer lifetime.
says that any conventional high-powered competition rifle barrel needs
to be re-chambered after each 1,100 rounds. The breech end is
cut-off and a new chamber cut, making the barrel a few inches shorter.
How to fire lap a rifle
Fire lapping should be done first, before you mount any sights or a
telescopic sight. For our 308 Remington 600 rifle, our coach
recommended using 24 rounds of Federal Gold Medal Match
At 50 yards, individual shots are made into a berm:
After each of the first 10 shots:
- Remove the bolt.
- STARTING from the breech end, run a brush wet with bore
cleaner one-way out toward the muzzle end of the rifle.
- After the brush exits at the muzzle end, remove it and
withdraw the rod.
- Run a clean patch, one way from the breech to the muzzle
end of the barrel. The third patch should look clean.
For shots 11-24, the fire-lapping is done every two shots, repeat
After 24 rounds, the rifle is ready to accept sights.