Well I'll be the dissenter in this. I always break in my barrels. Never had the money to buy two barrels and try a side by side to see if it really makes a difference. I use the procedures VVCG requires if you want to keep the barrel's accuracy guaranteed by them. But it also is just about what my dad taught me 35 years ago. Personally, I can't see where cleaning a barrel more often could hurt, so even after the first 55 shots I still clean after every 5-10 shots. And yes I do take a cleaning rod with me to the range. The other side of that is I've been a military pistol instructor (2 years at the Naval Academy Range) and seen over 500 rounds shot through all 50+ 1911A1's without cleaning. Couldn't really say accuracy suffered because of it. I will say your hunting barrel should be in the same condition as it is when your sighting it in. So if you don't clean often, and zero with a dirty barrel, you should shoot a couple fouling shots before you head off to hunt. Wouldn't want that first shot out of a clean barrel to be somewhere you didn't intend it to go.
Helicopter Bill
VVCG says:
First 5 Shots Clean the barrel after EACH shot*
Next 50 Shots Clean the barrel after each 3-5 shots*
Your new barrel is now Broken-in
* Cleaning the Barrel Means:
Using a plastic coated cleaning rod, a good quality bronze brush and patch tip, flannel patches and a quality bore solvent.
(1) Saturate a patch with bore solvent, Run the patch thru the bore (from breech end ONLY) twice to remove powder fouling and wet the bore.
(2) Saturate the bronze brush with solvent and make 20 passes through the barrel (10 Cycles).
(3) Let the solvent soak in the barrel for 10 minutes.
(4) Saturate the brush with solvent again. Make 20 more passes (10 cycles) thru the Barrel.
(5) Push 3 clean patches thru the barrel to remove excess solvent and loosened Fouling.
Barrel cleaning is now complete. To insure the highest possible barrel quality, you should repeat this cleaning procedure every 20-25 shots. Failure to do so could result in excessive build up of fouling in the bore causing accuracy to deteriorate. Our accuracy guarantee does not cover excessively fouled barrels.