Alliance Custom Armory
Alliance Custom Armory

Alliance's Recommended Barrel Break-in Procedure

This procedure is recommended to polish the bore of your new rifle.  The idea is to shoot a bullet down the bore and then clean the bore to bare metal.  The bullet will polish the bore and leave copper in the rough spots.  To effectively polish the bore, the copper must be cleaned out to expose the rough spots for the next bullet.  As you go through the process, you will notice the bore fouls less the further into the process you go.  Some barrels require more break-in shots than others.  This procedure outlines the process, but the length depends on the barrel.

  1. Clean the rifle per the ACA Recommended Cleaning Procedure.  The first cleaning will not require the Copper solvent, as no bullets have been fired down the bore.
  2. Fire the rifle one time.
  3. Clean the rifle per the ACA Recommended Cleaning Procedure.  This time, use the full process to clean the bore to bare metal.
  4. Repeat steps 2 and 3 until five shots have been fired.
  5. Fire the rifle three times and clean per step 3.
  6. Repeat step 5 until you have fired 5 – 3 shot groups.
  7. Fire the rifle 5 times and clean per step 3.
  8. Repeat step 7 until you have fired 4 – 5 shot groups.
  9. At this point, you should have fired 40 shots, and most barrels would be broke-in.  If you are still seeing significant fouling, shoot 4 – 5 shot groups, cleaning between groups.  After 60 shots, there will be a significantly diminished effect of polishing with any additional shots.  For the next 50 shots, clean after each shooting session.  You may notice less copper fouling with each shooting session until you get 100 – 150 shots down the barrel.



Where to Find Us:

Alliance Custom Armory
28637 Rostad Trl
Underwood, MN 56586


 Chris: 612-201-8023

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